Cook the noodles in boiling, salted water until tender. Drain and rinse in cool water. Melt the butter in skillet. Add the meat and cook until it has lost its pink color. Add the salt, pepper, garlic salt and tomato sauce, simmer for 5 minutes. remove from heat. Combine the cottage cheese, sour cream, onions and noodles. Alternate layers of noodle mixture with meat in 2 quart casserole. Top with cheese and bake for 30 minutes at 350ºF. or until brown. Makes 6 - 8 servings.