Spaghetti Casserole - cooking recipe

Ingredients

1 onion, chopped
1 Tbsp. butter
1 lb. ground beef
1 (8 oz.) pkg. spaghetti
1 large can tomatoes
1 medium jar pimentos
1/2 lb. sharp cheese, grated

Preparation

Cook onion in butter in frying pan.
Add meat; cook until done.