Tuna Melt Casserole: Cheesy Tuna Bake
Select a high-quality cheddar cheese to ensure your tuna melt casserole has a sharp, savoury profile. Buy a block of mature cheddar and shred it yourself; pre-shredded varieties contain anti-caking agents that stop the cheese from melting into a smooth sauce. Avoid mild cheeses that lack the strength to cut through the richness of the milk and butter.
This dish combines cooked pasta with a rich roux-based sauce, tuna, capers, and cherry tomatoes. You bake the mixture at 200°C (400°F) for 45 minutes until the top is a deep golden brown. Allow the casserole to rest 5 minutes before serving so the sauce can set. This ensures you get clean slices of a thick, bubbly bake that balances creamy textures with the saltiness of capers.
Tuna Melt Casserole: Cheesy Tuna Bake
Recipe cardIngredients
Watch how it's made
Instructions
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Prepare the oven
Preheat your oven to 200°C (400°F). Lightly grease a 20 cm × 25 cm baking dish with butter or olive oil. This prevents the cheese from sticking to the sides during the bake.
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Cook the pasta
Boil the pasta in well-salted water for 7 minutes. Drain it with a colander once it is just al dente. Keep the pasta warm so it incorporates easily into the sauce.
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Make the roux
Melt the butter in a saucepan over medium heat. Whisk in the flour and cook for 1 minute. Stir constantly to ensure the roux is smooth and does not burn.
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Thicken the sauce
Gradually whisk in the milk to avoid lumps. Bring the mixture to a gentle simmer and cook for 3–4 minutes. Stop when the sauce reaches a thick, gravy-like consistency.
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Flavour the cheese sauce
Reduce the heat to low and stir in 150 g of shredded cheddar until smooth. Mix in the Dijon mustard, salt, white pepper and red pepper flakes. This ensures the seasonings are evenly distributed.
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Combine the ingredients
Fold the tuna, capers, chopped tomatoes and 50 g of cheddar into the sauce. Toss in the cooked pasta until every strand is coated. Even coating prevents dry patches in the final bake.
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Bake the casserole
Transfer the mixture to your prepared dish and spread it evenly. Sprinkle the remaining shredded cheddar on top. Bake uncovered for 45 minutes until the top is a deep golden brown.
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Rest and garnish
Remove the dish from the oven and let it rest for 5 minutes. This allows the sauce to set for easier slicing. Garnish with fresh parsley and black pepper before serving.
Watch your roux closely when whisking the flour and butter. If the mixture browns too quickly, it will taste burnt rather than nutty. Add the milk slowly and whisk vigorously to ensure the sauce remains silky and free of lumps.
Cheddar cheese substitutions
Use Gruyère or Emmental if you cannot find cheddar. These cheeses melt well but offer a nuttier, more refined flavour. Do not use a hard cheese like Parmesan as the primary base, as you need the creamy, gooey consistency that cheddar provides to bind the pasta.
What to serve with it
Pair this bake with a crisp green salad dressed in lemon vinaigrette to cut through the richness of the cheese. Garlic-infused crusty bread is also a strong choice for dipping into the sauce. For a final touch, sprinkle toasted pine nuts or slivered almonds over the plate for crunch.
Storing and reheating
Store leftovers in a covered container for no more than 2 hours at room temperature. For longer storage, freeze in an airtight container for 3 months. Thaw overnight in the refrigerator and reheat in a 150°C (300°F) oven for 15–20 minutes until the centre is hot.
Nutrition per serving
- Calories
- 480
- Protein
- 24.5 g
- Carbs
- 32.0 g
- Fat
- 26.0 g
- Fiber
- 2.5 g
- Sugar
- 6.0 g
Estimated, and offered as a guide rather than a medical figure.
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Questions people ask
What are some common mistakes when making a tuna melt?
Overcooking the pasta is a frequent error. Cook the noodles until they are just al dente so they do not turn mushy during the 45 minutes they spend baking in the oven.
What are the ingredients in a 5-ingredient tuna casserole?
This specific recipe requires more than five ingredients to achieve its creamy texture. To simplify, you could use a pre-made condensed cream soup, but you would lose the control over salt and seasoning provided by a homemade roux.
What are the ingredients in an old fashioned tuna casserole?
Traditional versions often use canned mushroom soup and frozen peas. This version replaces the soup with a fresh béchamel and adds capers and cherry tomatoes for a brighter, more savoury profile.
