Preheat oven to 400 degrees F. Coat a 13x9-inch baking dish with cooking spray.
cooking spray
Bring a large pot of salted water to a boil over medium-high heat. Add egg noodles and cook al dente, about 7 minutes. Drain and set aside.
12 oz. wide egg noodles
In a large skillet, melt butter and sauté chopped onion and celery until tender, about 3-4 minutes.
1 tbsp. butter, 1 small chopped yellow onion, 3 celery stalks, chopped
In a large bowl, combine cream of mushroom soup, sautéed celery and onion, milk, 1-1/2 cups shredded cheese, garlic powder and onion powder.
2 (10.5 oz.) cans condensed cream of mushroom soup, 1 cup whole milk, 2 cups shredded sharp or extra sharp cheddar cheese, divided, 1/2 tsp. garlic powder, 1/2 tsp. onion powder
Stir in tuna, sliced mushrooms, peas and corn. Gently fold in cooked egg noodles.
2 (5 oz.) cans tuna, 1 (4.5.) can sliced mushrooms, 1 cup frozen peas, 1/2 cup frozen corn
Spoon into baking dish and spread evenly. Sprinkle potato chips and remaining 1/2 cup cheese over the top.
1 cup crushed potato chips
Bake 20-25 minutes until bubbly and cheese is lightly browned. Remove from oven and allow to rest for 10 minutes before serving.
Sprinkle with chopped parsley and sliced green onions, Serve.
chopped parsley and sliced green onion for garnish