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Casserole dish with tuna and orzo with crunchy breadcrumb topping.

Tuna and Orzo Pasta Casserole

Diana
Tuna and orzo casserole is a combination of pasta, peas, and a homemade Parmesan cheese sauce. No condensed soup in this tuna casserole!
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Servings 4 to 6 servings
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Course Casseroles, Tuna
Cuisine American
Prep Time 10 minutes
Cook Time 35 minutes

Ingredients
  

  • 1 cup orzo pasta, dry
  • 3 tablespoons butter
  • 8 ounces fresh sliced mushrooms
  • 4 green onions, thinly sliced
  • 3 tablespoons all-purpose flour
  • 1 1/2 cups milk
  • 2 cans, 5 to 6 ounces each tuna, drained and flaked
  • 1 cup frozen peas, thawed and lightly steamed (or peas and carrots combination)
  • 2 tablespoons diced pimiento (optionaldecorated-steps
  • 1/2 cup fresh grated Parmesan cheese, divided use
  • Kosher salt and freshly ground black pepper, to taste

For the Topping

  • 2 tablespoons melted butter
  • 3/4 cup panko crumbs

Instructions

  • Preheat the oven and prepare the baking dish. Heat the oven to 350°F. Butter a 2-quart baking dish.
  • Cook the pasta. Cook the orzo in boiling water following the package directions. Drain and set aside.
  • Make the sauce. Meanwhile, melt the butter in a large saucepan over medium heat. Add the mushrooms and green onions and cook, stirring, until the mushrooms are golden brown. Stir in the flour and continue cooking, stirring, for 1 to 2 minutes. Gradually add the milk and continue cooking until thickened.
    Creamy mushroom and green onion sauce in a skillet.
  • Finish the filling. Add the flaked tuna and peas to the sauce mixture along with the orzo and half of the Parmesan cheese. Stir in pimiento, if using. Taste and season with salt and freshly ground black pepper. Spoon the mixture into the prepared baking dish.
    Tuna and orzo casserole filling mixture with peas and mushrooms.
  • Make the topping. Combine 2 tablespoons of melted butter with the panko crumbs and the remaining Parmesan cheese. Sprinkle over the casserole.
    Tuna casserole with orzo in a baking dish with breadcrumb topping, ready to bake
  • Bake the casserole. Bake for 20 to 25 minutes, or until the topping is lightly browned and the casserole is bubbling around the edges.
    orzo in a baking dish with breadcrumb topping, baked.
Keyword orzo pasta, tuna casserole
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