Preheat the oven to 350 degrees Fahrenheit.
Cook pasta according to package directions. Drain the extra water. 8 ounces short noodles
Mix Cream of Mushroom soup, 1 cup of the cheddar cheese, sour cream, tuna, whole milk, pepper, and garlic salt together. 10 oz can mushroom soup, 2 cups grated cheddar cheese, 1 cup sour cream, 5 oz tuna fish, 1/2 cup whole milk, 1 tsp pepper, 1/2 tsp garlic salt
Add in the cooked noodles, and peas and fold them into the mixture. 1 cup frozen peas
Transfer the mixture into a 9x13 baking dish. Top the mixture with remaining 1 cup of cheese, and
Drain pasta and mix into casserole mixture
Put everything into an oven proof casserole dish
Bake in preheat 350 degree oven for 15 minutes
Sprinkle with the cheese and Panko bread crumbs, then finish baking for 15 more minute 1/2 cup Panko bread crumbs
Serve, (half my family likes to eat it with ketchup)