There's nothing quite as comforting as a warm, creamy Cheesy Tuna Mornay bubbling away in the oven, filling the kitchen with a savory, cheesy aroma. This hearty dish combines tender pasta, flaky tuna, and a velvety white sauce, all topped with melted, golden cheese for the perfect, family-friendly dinner.

The first time I made Tuna Mornay, it was one of those nights when I needed something quick and satisfying. To my surprise, it became an instant favorite, requested regularly ever since. With its simple ingredients and timeless flavor, it’s sure to become a staple in your home, too!

Why You'll Love This Cheesy Tuna Mornay

Get ready to fall in love with a dish that hits all the right notes. This Cheesy Tuna Mornay is comfort food at its finest, combining rich, satisfying flavors with the ease of a one-pan meal.

First off, this recipe is unbelievably simple to prepare. In less than 45 minutes, you can transform pantry staples into a gourmet-level family dinner, making it a perfect go-to for busy weeknights. The ease of using canned tuna means you’ll always have the main ingredient on hand, while the pasta and creamy sauce make this dish irresistible.

Next, it’s a budget-friendly meal that doesn’t skimp on taste. With everyday ingredients like pasta, milk, and cheese, you can create a dish that feels luxurious without breaking the bank. Plus, the recipe yields generous portions, perfect for feeding a hungry family or meal-prepping for the week.

Finally, this Cheesy Tuna Mornay is incredibly adaptable. Add your favorite vegetables, switch up the cheese, or even use gluten-free pasta to make it your own. It’s a recipe that’s both flexible and forgiving, great for those nights when you need something customizable.

Ingredients Notes

The beauty of Cheesy Tuna Mornay lies in the simplicity of its ingredients. Each component plays a vital role, creating a perfect blend of flavors and textures.

Pasta is the backbone of this dish. You can use any short pasta shape like penne, macaroni, or shells. These shapes hold onto the sauce well, making every bite deliciously creamy. If you’re aiming for a healthier twist, try using whole wheat or legume-based pasta.

Canned tuna is a convenient and affordable protein. Make sure to choose a variety packed in water rather than oil for a lighter, fresher taste. Flake the tuna well before mixing it into the sauce to distribute it evenly.

Cheese is what takes this Mornay to the next level. A mix of shredded cheddar and mozzarella works beautifully, giving both sharp flavor and a stretchy, melty texture. For a stronger flavor profile, add a sprinkle of Parmesan on top.

Milk and butter form the base of the creamy white sauce. Whole milk provides the richest flavor, but you can substitute with lower-fat milk if you prefer. The butter adds depth and smoothness to the sauce, ensuring a luxurious mouthfeel.

Vegetables like peas or sweetcorn are a fantastic way to sneak some nutrition into this dish. Their slight sweetness pairs well with the savory tuna and creamy sauce, adding both flavor and color. If you’re feeling adventurous, add diced carrots or sautéed mushrooms for extra depth.

For equipment, you'll need a large saucepan, a deep baking dish, and a whisk to achieve a lump-free sauce. A large skillet also helps for even heating.

How To Make This Cheesy Tuna Mornay

Creating this comforting Cheesy Tuna Mornay is easier than you think. Follow these simple steps for a perfect dish every time.

Start by preheating your oven to 375°F (190°C) and bringing a large pot of salted water to a boil. Cook the pasta until it’s just al dente, then drain and set it aside. Make sure not to overcook the pasta, as it will continue to cook in the oven.

While the pasta cooks, prepare the white sauce. Melt butter in a large saucepan over medium heat. Add an equal amount of all-purpose flour and whisk continuously for 2-3 minutes until the mixture turns a pale golden color. This step ensures your sauce will be smooth and free of any raw flour taste.

Gradually pour in milk, whisking constantly to prevent lumps. Continue cooking and whisking until the sauce thickens enough to coat the back of a spoon. Season generously with salt, pepper, and a hint of nutmeg for warmth. If you like a bit of spice, a pinch of cayenne adds a gentle kick.

Once the sauce is ready, stir in the shredded cheese until melted and smooth. Add the cooked pasta, flaked tuna, and your choice of vegetables (like frozen peas or sweetcorn). Gently fold everything together until well combined and coated in the creamy sauce.

Transfer the mixture to a greased baking dish. Sprinkle a generous layer of shredded cheese over the top and bake for 15-20 minutes, or until the cheese is bubbly and golden. Let it cool for a few minutes before serving; the sauce will thicken slightly as it sits.

Storage Options

Cheesy Tuna Mornay is an excellent make-ahead meal, perfect for leftovers or meal prep. Here’s how to store it for maximum freshness.

To refrigerate, allow the dish to cool completely before transferring it to an airtight container. It will keep in the fridge for up to 3-4 days. For easy reheating, divide it into individual portions before storing.

To freeze, place the cooled Mornay in a freezer-safe container, leaving some room for expansion. It will stay fresh for up to 3 months. Thaw overnight in the refrigerator before reheating.

For reheating, use the oven or microwave. If using the oven, cover the dish with foil and bake at 350°F (175°C) until heated through. Add a splash of milk if the sauce seems too thick. If microwaving, stir halfway through to ensure even heating.

Variations and Substitutions

One of the best things about this Cheesy Tuna Mornay is how adaptable it is. Here are some ways to customize it to your liking.

Add more vegetables for a boost of nutrition. Chopped spinach, diced bell peppers, or sautéed mushrooms work wonderfully. You can even mix in leftover roasted vegetables for extra flavor.

Make it gluten-free by swapping regular pasta with gluten-free pasta and using gluten-free flour for the sauce. The rest of the recipe stays the same, so it’s a seamless substitution.

Try different cheeses to change the flavor profile. Gruyere, sharp white cheddar, or even a smoked gouda can add a unique twist. Just be sure to use a cheese that melts well.

Switch up the protein if tuna isn’t your favorite. Cooked, shredded chicken or even canned salmon are great alternatives. For a vegetarian version, consider adding white beans or chickpeas for protein.

Lastly, don’t be afraid to experiment! This recipe is forgiving, so feel free to tailor it to your family’s taste. Let your creativity shine, and you might just discover a new favorite variation.