Prep Time::20 mins
Cook Time::35 mins
Total Time::55 mins
Servings::8
Yield::1 9×13-inch casserole
Ingredients
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1 (12 ounce) package egg noodles
4 ¼ teaspoons kosher salt, divided
4 tablespoons salted butter, divided
5 teaspoons olive oil, divided
1 (8 ounce) package sliced fresh mushrooms
1 small white onion, minced
¼ cup all-purpose flour
2 cups milk
1 ½ cups chicken stock
2 tablespoons lemon juice
1 teaspoon Dijon mustard
½ teaspoon ground black pepper
1 ½ cups shredded white Cheddar cheese
1 cup frozen sweet peas
2 (6 ounce) cans tuna, drained
1 cup panko bread crumbs
¼ teaspoon ground paprika
2 tablespoons finely chopped fresh parsley
Directions
Preheat the oven to 375 degrees F (190 degrees C). Grease a 9×13-inch baking dish.
Bring a large pot of water to a boil. Add egg noodles and 3 teaspoons salt to the boiling water; cook until tender yet firm to the bite, about 6 minutes. Drain noodles. Return to pot and set aside.
Heat 2 tablespoons butter and 1 tablespoon oil in a large skillet over medium-high heat. Add mushrooms and onion and cook until mushrooms are softened and onions are translucent, about 4 minutes. Add remaining butter; stir constantly until melted. Sprinkle flour over vegetable mixture and cook, stirring constantly, for 1 minute. Stir in milk and stock and bring to a simmer, stirring often. Simmer for 5 minutes. Stir in lemon juice, Dijon mustard, 1 teaspoon salt, and pepper.
Add sauce mixture to reserved noodles. Stir in 1 cup Cheddar cheese, peas, and tuna. Pour mixture into the prepared baking dish and sprinkle remaining Cheddar cheese over the top.
Stir together bread crumbs, remaining 2 teaspoons oil, remaining 1/4 teaspoon salt, and paprika in a small bowl. Sprinkle bread crumb mixture evenly over the casserole.
Bake in the preheated oven until golden and bubbly, 25 to 30 minutes. Sprinkle with parsley and serve.