Stroganoff Casserole

1 pound ground beef
1/2 teaspoon garlic salt
2 Tablespoons flour
1 small carton sour cream
2 Tablespoons dried chopped onion
1 can cream of chicken soup
1 can cream of mushroom soup
1/2 package noodles
sliced mushrooms


Cook noodles. Drain well. Brown beef, onion and garlic well. Add flour and soups. Simmer 10 minutes. Add sour cream and stir well. Add noodles and mushrooms. Place in a casserole dish. Top with grated cheese if desired. Bake at 350 degrees for 15 to 20 minutes