Pin it A comforting, creamy classic featuring tender noodles, savory tuna, and a golden, crunchy onion topping — perfect for family dinners or cozy gatherings.
I first made this tuna casserole on a busy weeknight, hoping for something both comforting and quick. Watching everyone eagerly dig in made it clear this classic never goes out of style.
Ingredients
- Pasta: 340 g (12 oz) egg noodles
- Seafood: 2 cans (each 170 g/6 oz) tuna in water, drained
- Vegetables: 1 cup frozen peas, thawed, 1 small onion, finely chopped, 2 cloves garlic, minced, 1 cup sliced button mushrooms (optional)
- Sauce: 2 tablespoons unsalted butter, 2 tablespoons all-purpose flour, 2 cups whole milk, 120 ml (½ cup) sour cream, 1 teaspoon Dijon mustard, ½ teaspoon salt, ½ teaspoon black pepper, ½ teaspoon dried thyme
- Cheese: 1 cup (about 100 g) shredded cheddar cheese
- Topping: 1 cup crispy fried onions (store-bought or homemade)
Instructions
- Prep the Oven:
- Preheat oven to 190°C (375°F). Lightly grease a 23 x 33 cm (9 x 13 inch) baking dish.
- Cook the Noodles:
- Cook egg noodles according to package directions until al dente. Drain and set aside.
- Make the Sauce Base:
- In a large skillet over medium heat, melt butter. Add chopped onion and mushrooms. Sauté 4 5 minutes until softened. Add garlic and cook 1 minute more.
- Thicken the Sauce:
- Sprinkle flour over vegetables and stir for 1 minute. Gradually whisk in milk, stirring constantly. Cook until sauce thickens, about 3 4 minutes.
- Finish the Sauce:
- Stir in sour cream, Dijon mustard, salt, pepper, and thyme. Remove from heat.
- Combine Everything:
- Add drained tuna, peas, cheddar cheese, and cooked noodles to the sauce. Mix gently until combined.
- Assemble the Casserole:
- Spoon mixture into prepared baking dish.
- Add Topping:
- Sprinkle crispy fried onions evenly over the top.
- Bake:
- Bake uncovered for 25 30 minutes, or until bubbly and golden.
- Rest and Serve:
- Let stand 5 minutes before serving.
Pin it This casserole appeared at many childhood gatherings, always met with smiles when we scooped out the bubbling first piece.
Serving Suggestions
Pair with a fresh green salad and a glass of dry white wine such as Sauvignon Blanc for a comforting meal.
Storage and Leftovers
Store leftover casserole in an airtight container in the fridge up to 3 days. Reheat in the oven for best texture.
Nutritional Information
Per serving: 430 calories, 17 g fat, 44 g carbohydrates, 25 g protein.
Pin it Savor the warm, creamy comfort with every bite and enjoy the golden onion crunch!
Common Questions
- → What type of noodles work best?
Egg noodles provide the ideal texture, holding the creamy sauce well without becoming mushy.
- → Can I use fresh onions instead of fried onions as topping?
The crispy fried onion topping adds a golden crunch that fresh onions can't replicate but fresh onions can be sautéed into the sauce for flavor.
- → Is there a way to add more vegetables?
Frozen peas and mushrooms can be increased or other vegetables like spinach or bell peppers can be incorporated for extra nutrition.
- → How can I make the sauce thicker if needed?
Ensure flour is thoroughly cooked with butter and sautéed vegetables before whisking in milk to achieve a smooth, thickened sauce.
- → Can different cheeses be used?
Cheddar is recommended for sharpness, but Swiss or Monterey Jack also offer delicious alternatives.