Microwave Ravioli Casserole

Grrrrrgh!
Course : Microwave
From: HungryMonster.com
Serves: 6
 

Ingredients:

1 pound ground beef
1 small onion
30 ounces beef ravioli
1 cup Cheddar cheese
 

Preparation:

Crumble beef into 2-quart microwavable casserole. Add onion. Cover loosely and microwave on High 5 to 6 minutes, stirring after 3 minutes, until beef is no longer pink; drain. Stir in ravioli. Cover tightly and microwave 5 to 7 minutes, stirring after 3 minutes, until hot. Sprinkle with cheese. Cover and let stand about 5 minutes or until cheese is melted.