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baking dish with tuna tetrazzini

Tuna Tetrazzini Recipe

Diana Rattray
Spaghetti and canned tuna team up with mushrooms and Parmesan cheese in this delicious tuna tetrazzini casserole, a twist on the classic turkey tetrazzini.
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Servings 4 servings
Calories 548
Prep Time 10 minutes
Cook Time 40 minutes

Ingredients
  

  • Butter for the baking dish
  • 1 tbsp kosher salt, for the pasta cooking water
  • 6 ounces spaghetti
  • 4 tbsp butter, divided
  • 6 ounces sliced mushrooms
  • 1 ½ tbsp all-purpose flour
  • ½ tsp fine salt, or to taste
  • tsp pepper, or to taste
  • 2 cups whole milk
  • ¾ cup grated Parmesan cheese, divided
  • 2 (5-ounce) cans tuna, drained and flaked
  • 1 cup soft breadcrumbs

Recommended Equipment

  • 2-quart baking dish

Instructions

  • Preheat the oven to 350°F and butter a 2-quart baking dish.
    Butter for the baking dish
  • Bring a large pot of water to a boil with 1 tablespoon of kosher salt. Add the spaghetti and cook according to the package directions until al dente. Drain and set aside
    1 tbsp kosher salt | 6 ounces spaghetti
  • Tip: Cook the spaghetti just to al dente since it will soften a bit more as the casserole bakes.
  • Melt 2 tablespoons of the butter in a large saucepan over medium heat. Add the mushrooms and sauté for 5 to 7 minutes, or until softened and their moisture has cooked off. Stir in the flour, salt, and pepper. Cook for 2 minutes, stirring constantly. Gradually stir in the milk and continue cooking over medium-low heat, stirring, until thickened.
    2 tbsp butter | 6 ounces sliced mushrooms | 1 1/2 tbsp all-purpose flour | 1/2 tsp fine salt | 1/8 tsp pepper | 2 cups whole milk
  • Stir 1/2 cup of the Parmesan cheese into the sauce. Add the tuna and spaghetti and stir until blended.
    6 ounces spaghetti | ½ cup grated Parmesan cheese | 2 (5-ounce) cans tuna
  • Transfer the pasta mixture to the prepared baking dish and sprinkle with the remaining 1/4 cup Parmesan cheese. Melt the remaining 2 tablespoons butter and toss with the breadcrumbs. Sprinkle the breadcrumbs over the casserole.
    2 tbsp butter | ¼ cup grated Parmesan cheese | 1 cup soft breadcrumbs
  • Sprinkle the bread crumbs over the top of the casserole.
  • Bake, uncovered, for about 25 to 30 minutes, or until the bread crumbs are browned and the casserole is bubbly around the edges.

Nutrition

Calories: 548kcalCarbohydrates: 52gProtein: 32gFat: 23gSaturated Fat: 13gPolyunsaturated Fat: 2gMonounsaturated Fat: 5gTrans Fat: 0.5gCholesterol: 87mgSodium: 1112mgPotassium: 601mgFiber: 3gSugar: 9gVitamin A: 750IUVitamin C: 1mgCalcium: 389mgIron: 3mg

Disclaimer:

Our nutritional information is based on a third-party application that analyzes the ingredients list to determine the values. The information is meant to be helpful, but should be considered an estimate. Values may differ depending on measurements, brands, serving variations, and database availability.

Keyword tetrazzini, tuna casserole
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