Cheeseburger Rice

Cheeseburger Rice
1 pound ground beef
1 small onion, chopped
1 1/2 cup water
1/2 cup ketchup
2 tablespoons prepared mustard
1/2 teaspoon salt
1/8 teaspoon pepper
1 1/2 cups Minute original rice, uncooked
1 cup (4 ounce) shredded Cheddar cheese
Brown meat and onion in large skillet on medium-high heat; drain fat. Stir in water, ketchup, mustard, salt and pepper. Bring to boil. Stir in rice; cover. Remove from heat. Let stand 5 minutes.Fluff with fork. Sprinkle with cheese; cover. Let sit for about 3 minutes until cheese melts.