Best Tuna Casserole Ingredients 1 (12 ounce) package egg noodles 1/4 cup chopped onion 2 cups shredded Cheddar cheese 1 cup frozen green peas 2 (6 ounce) cans tuna, drained 2 (10.75 ounce) cans condensed cream of mushroom soup 1/2 (4.5 ounce) can sliced mushrooms 1 cup crushed potato chips Directions Bring a large pot of lightly salted water to a boil. Cook pasta in boiling water for 8 to 10 minutes, or until al dente; drain. Preheat oven to 425 degrees F (220 degrees C). In a large bowl, thoroughly mix noodles, onion, 1 cup cheese, peas, tuna, soup and mushrooms. Transfer to a 9x13 inch baking dish, and top with potato chip crumbs and remaining 1 cup cheese. Bake for 15 to 20 minutes in the preheated oven, or until cheese is bubbly. Back