Very Easy Beef Stroganoff

1 lb ground beef
1 small onion
1 can cream of mushroom
½ cup of milk
2 cup cooked noodles
2 tablespoons of butter
1 teaspoon salt
¼ teaspoon pepper
½ cup sour cream

Brown beef with onions, drain the fat. Stir in milk, noodles, butter, salt and pepper. Cover and simmer for 10-15 minutes. Uncover and simmer for approx. 10 minutes. Remove from heat and stir in sour cream. Heat through but do not bring to boil. Serve immediately.