Tuna Tetrazzini

Tuna Tetrazzini is a comforting, creamy pasta casserole that combines tender spaghetti with chunks of savory tuna, sautéed mushrooms, and a luscious homemade béchamel sauce. This easy-to-make dish is topped with a golden crust of mozzarella cheese, breadcrumbs, and fresh parsley, delivering layers of flavor and irresistible texture. Ideal for weeknight dinners or potlucks, this recipe is budget-friendly yet indulgent, featuring pantry staples like canned tuna and everyday cheeses. Ready in under an hour, this baked classic is perfect for feeding a crowd while delighting taste buds with its rich, cheesy goodness.

Nutriscore Rating: 68/100

Prep Time:15 mins

Cook Time:40 mins

Total Time:55 mins

Servings: 6

Ingredients

• 12 oz spaghetti
• 12 oz canned tuna
• 4 tbsp unsalted butter
• 1 cup all-purpose flour
• 2 cups chicken broth
• 2 cups whole milk
• 8 oz mushrooms, sliced
• 1 medium onion, finely chopped
• 2 cloves garlic cloves, minced
• 1 cup parmesan cheese, grated
• 1 cup shredded mozzarella cheese
• 1 cup breadcrumbs
• 1 tbsp olive oil
• 1 tsp salt
• 0.5 tsp black pepper
• 2 tbsp fresh parsley, chopped

Directions

Step 1

Preheat your oven to 375°F (190°C).

Step 2

Cook the spaghetti in a large pot of salted boiling water according to package instructions until al dente. Drain and set aside.

Step 3

In a large skillet, melt 2 tablespoons of butter over medium heat. Add the mushrooms, onion, and garlic, and sauté until softened and golden, about 5-7 minutes.

Step 4

Stir in the remaining 2 tablespoons of butter and let it melt. Sprinkle the flour over the mixture and stir continuously for 1-2 minutes to remove the raw flour taste.

Step 5

Slowly whisk in the chicken broth and milk, ensuring there are no lumps, and bring the mixture to a gentle simmer. Cook until slightly thickened, about 2-3 minutes.

Step 6

Stir in the parmesan cheese, salt, and black pepper. Mix until fully incorporated and the sauce is smooth. Remove from heat and fold in the canned tuna (drained) and cooked spaghetti.

Step 7

Grease a 9x13-inch baking dish with olive oil or non-stick spray. Pour the tuna and spaghetti mixture into the dish and spread it out evenly.

Step 8

In a small bowl, mix together the breadcrumbs, shredded mozzarella cheese, and parsley. Sprinkle the mixture evenly over the top of the casserole.

Step 9

Bake in the preheated oven for 20-25 minutes, or until the top is golden and bubbling.

Step 10

Allow the casserole to cool slightly before serving. Garnish with additional parsley if desired.

Nutrition Facts

Serving size	(2494.2g)

Amount per serving	% Daily Value*
Calories	3438.9

Total Fat 139.8g	0%
Saturated Fat 72.3g	0%
Polyunsaturated Fat 1.9g
Cholesterol 462.9mg	0%
Sodium 8497.1mg	0%
Total Carbohydrate 328.7g	0%
Dietary Fiber 18.9g	0%
Total Sugars 44.8g
Protein 227.4g	0%

Vitamin D 509.6IU	0%
Calcium 2547.6mg	0%
Iron 22.7mg	0%
Potassium 3038.0mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 36.1%

Protein: 26.1%

Carbs: 37.8%