Tuna Mornay Rice Bake

Make dinner stress-free with this easy tuna mornay casserole. Packed with creamy sauce, tender tuna, and baked to golden perfection, it’s a comfort food classic ideal for busy nights. Simple ingredients, maximum flavor, and minimal effort!

Mamaw’s Kitchen

Updated on Mon, 23 Mar 2026 23:52:34 GMT

Tuna Mornay Rice Bake: A Heartwarming Family Classic

There’s something undeniably comforting about a Tuna Mornay Rice Bake, a dish that evokes memories of family gatherings and cozy evenings. As the aroma fills the kitchen, the rich, cheesy scent mingles with the earthy notes of cooked rice and sautéed onions, creating an inviting atmosphere that beckons everyone to the table. Imagine the first enticing whiff as you walk into the room, instantly transporting you back to your childhood, where your loved ones would gather around for a hearty meal. The creamy mornay sauce, with its velvety texture, drapes lovingly over the fluffy rice, harmonizing beautifully with the tender pieces of tuna and bright green peas. Each bite is a delightful combination of flavors and textures, from the slight crunch of the topping to the warm, gooey cheese that pulls away in delicious strings.

As I took my first forkful of this Tuna Mornay Rice Bake, I was enveloped in a wave of nostalgia. The combination of the savory fish and the smooth, cheesy sauce danced on my palate, while the peas added a hint of sweetness, perfectly balancing the dish. I was reminded of my mother’s laughter as she served it up, her pride evident as we devoured every last morsel. The warmth of the oven, the clinking of cutlery against plates, and the joyous chatter around the table created a symphony of comfort and love. This dish is not just a recipe; it’s a cherished memory that brings families together, sharing stories and laughter over a steaming plate of goodness.

Why You’ll Love It

  • Every bite of Tuna Mornay Rice Bake bursts with creamy, cheesy goodness that warms the soul.
  • The combination of tender tuna, fluffy rice, and vibrant peas creates a delightful symphony of flavors and textures.
  • It’s a simple, one-dish meal that makes cleanup a breeze, perfect for busy weeknights.
  • This dish is versatile and can be enjoyed as a comforting family dinner or a cozy lunch.
  • It’s an easy recipe that even novice cooks can master, allowing everyone to create heartwarming memories.

Ingredients You’ll Need

  • 2 cups cooked rice (about 370 grams), fluffy and perfect for absorbing the delicious mornay sauce.
  • 425 g canned tuna (about 15 ounces), drained and flaky, providing a rich source of flavor and protein.
  • 1 cup frozen peas (about 150 grams), vibrant and sweet, adding a pop of color and nutrition.
  • 1 small brown onion, finely chopped, aromatic and savory, enhancing the overall depth of flavor.
  • 2 tbsp olive oil, high-quality and fruity, ideal for sautéing the onion to golden perfection.
  • 2 tbsp butter, rich and creamy, the base for our luscious mornay sauce.
  • 2 tbsp plain flour, for thickening the sauce to a perfect consistency.
  • 2 cups milk (about 500 ml), full-bodied and creamy, ensuring the sauce is rich and smooth.
  • 1 1/2 cups grated tasty cheese (about 150 grams), melty and flavorful, integral for that cheesy goodness.
  • 1/2 tsp salt, to taste, enhancing all the wonderful flavors in the bake.
  • 1/2 tsp black pepper, freshly ground, adding a subtle warmth to the dish.
  • 1/2 cup grated tasty cheese (about 50 grams), for topping, ensuring a golden, bubbling finish.
  • 1/4 cup breadcrumbs (optional), for a crunchy texture on top, adding an extra layer of flavor.

How to Make Tuna Mornay Rice Bake

Preheat and Prepare

Begin your culinary journey by preheating your oven to 170°C (340°F) fan forced. This step is crucial, as a well-preheated oven ensures that your Tuna Mornay Rice Bake cooks evenly, resulting in a beautifully golden top. While the oven warms up, prepare your ingredients. Take a moment to chop the onion finely; this will not only enhance the flavor of your bake but also ensure that it cooks evenly and integrates seamlessly into the dish.

Sauté the Onion

In a frying pan, heat the olive oil over medium heat. Once it shimmers, add the finely chopped onion. Sauté the onion until it becomes soft and translucent, about 5–7 minutes. This step brings out the natural sweetness of the onion, which will add depth to your mornay sauce. Stir occasionally to prevent any browning; you want a gentle, even cook here.

Make the Mornay Sauce

In a separate saucepan, melt the butter over medium heat. Once melted, sprinkle in the plain flour, stirring continuously for about one minute. This forms a roux, the essential base for your mornay sauce. Gradually whisk in the milk, ensuring there are no lumps. Continue to stir until the mixture is smooth and begins to thicken, which should take about 3 to 4 minutes. Add in the grated tasty cheese, salt, and black pepper, stirring until the cheese has completely melted into the sauce, creating a rich and creamy consistency.

Combine the Ingredients

In a large mixing bowl, combine the cooked rice, drained tuna, frozen peas, and the sautéed onion. Gently fold these ingredients together, allowing the flavors to meld beautifully. Once combined, pour the warm mornay sauce over the mixture and mix well to ensure that every grain of rice and piece of tuna is coated in the luscious sauce. This step is where the magic happens—each bite will be a perfect blend of creamy goodness and hearty textures.

Transfer and Bake

Transfer the mixture into a baking dish, spreading it out evenly. Now, for that irresistible golden topping, sprinkle the extra grated cheese and breadcrumbs over the top if desired. This will create a delightful crunch that contrasts beautifully with the creamy filling. Bake in the preheated oven for 20 to 25 minutes, or until the top is golden and bubbling, filling your kitchen with an irresistible aroma.

Serve and Enjoy

Once baked to perfection, take the dish out of the oven and allow it to cool slightly before serving. The anticipation builds as you slice into the warm Tuna Mornay Rice Bake, revealing layers of cheesy goodness. Serve it hot, accompanied by a fresh salad or steamed vegetables for a complete meal. The combination of flavors and textures will surely have your family coming back for seconds!

Tips for Success

  • Use day-old cooked rice for the best texture; it’s firmer and absorbs the sauce better.
  • For an extra layer of flavor, try adding some herbs like dill or parsley to the mornay sauce.
  • Ensure to drain the tuna well to avoid excess moisture in the bake, which can make it soggy.
  • Let the bake sit for a few minutes after removing it from the oven; this helps it set and makes serving easier.
  • Experiment with different types of cheese for the mornay sauce; cheddar, mozzarella, or even a hint of blue cheese can elevate the flavor.

Variations to Try

  • Add cooked vegetables like broccoli or spinach to the mix for additional nutrition and flavor.
  • Swap out the tuna for cooked chicken or a plant-based protein for a different take on this dish.
  • Incorporate spices like paprika or cayenne for a kick of heat that complements the creamy sauce.
  • Use brown rice or quinoa instead of white rice for a healthier, nutty flavor profile.
  • Top with crushed potato chips instead of breadcrumbs for a unique crunch.

Frequently Asked Questions

→ Can I make this dish ahead of time?
Absolutely! You can prepare the Tuna Mornay Rice Bake a day in advance. Just cover it with foil and refrigerate until ready to bake.

→ Can I freeze the leftovers?
Yes, this dish freezes well! Allow it to cool completely, then store it in an airtight container for up to three months. Reheat in the oven for best results.

→ What can I serve with the Tuna Mornay Rice Bake?
This dish pairs wonderfully with a fresh green salad, roasted vegetables, or even a light soup for a complete meal.

Serving Suggestions

To serve your Tuna Mornay Rice Bake, scoop generous portions onto warm plates, allowing the creamy sauce to cascade invitingly over the sides. For a pop of color and freshness, garnish with a sprinkle of freshly chopped parsley or chives. Pair it with a crisp garden salad dressed in a zesty vinaigrette to balance the richness of the bake. This combination not only enhances the meal visually but also adds a refreshing contrast to the hearty dish.

Final Thoughts

As you savor this Tuna Mornay Rice Bake, allow yourself to be transported back to those cherished family moments, where the warmth of home-cooked meals brings everyone together. This recipe is not just about nourishment; it’s about love, laughter, and creating memories around the dinner table. I encourage you to try making this dish and experience the joy it brings to your family as you share stories over a comforting meal.

Chef’s Notes & Pro Tips

  • For a richer flavor, consider using whole milk or a combination of milk and cream in your mornay sauce.
  • To enhance the dish, try adding a squeeze of lemon juice before serving for a bright, fresh finish.
  • Make sure to stir the sauce continuously while adding the milk to avoid lumps and achieve a silky texture.
  • If you’re short on time, using pre-cooked rice can save you a step without compromising on flavor.
  • Be creative with your toppings; try incorporating herbs or spices in the breadcrumb mixture for added flavor.

Tuna Mornay Rice Bake

Jovanie's_Kitchen
Delicious Tuna Mornay Rice Bake recipe with step-by-step instructions.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 4 servings

Ingredients
  

  • 2 cups cooked rice about 370 grams
  • 425 g canned tuna about 15 ounces
  • 1 cup frozen peas about 150 grams
  • 1 small brown onion
  • 2 tbsp olive oil
  • 2 tbsp butter
  • 2 tbsp plain flour
  • 2 cups milk about 500 ml
  • 1 1/2 cups grated tasty cheese about 150 grams
  • 1/2 tsp salt
  • 1/2 tsp black pepper
  • 1/2 cup grated tasty cheese about 50 grams
  • 1/4 cup breadcrumbs optional

Instructions
 

  • Preheat and Prepare Begin your culinary journey by preheating your oven to 170°C (340°F) fan forced. This step is crucial, as a well-preheated oven ensures that your Tuna Mornay Rice Bake cooks evenly, resulting in a beautifully golden top.
  • Sauté the Onion In a frying pan, heat the olive oil over medium heat. Once it shimmers, add the finely chopped onion.
  • Make the Mornay Sauce In a separate saucepan, melt the butter over medium heat. Once melted, sprinkle in the plain flour, stirring continuously for about one minute.
  • Combine the Ingredients In a large mixing bowl, combine the cooked rice, drained tuna, frozen peas, and the sautéed onion. Gently fold these ingredients together, allowing the flavors to meld beautifully.
  • Transfer and Bake Transfer the mixture into a baking dish, spreading it out evenly. Now, for that irresistible golden topping, sprinkle the extra grated cheese and breadcrumbs over the top if desired.
  • Serve and Enjoy Once baked to perfection, take the dish out of the oven and allow it to cool slightly before serving. The anticipation builds as you slice into the warm Tuna Mornay Rice Bake, revealing layers of cheesy goodness.

Notes

  • Use day-old cooked rice for the best texture; it's firmer and absorbs the sauce better.
  • For an extra layer of flavor, try adding some herbs like dill or parsley to the mornay sauce.

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