Crumble ground beef in 2'/2-quart casserole.
MICROWAVE 4 to 5 MINUTES on HIGH, or until meat is no longer pink.
Drain excess fat.
Mix in beans, chili and corn.
Carefully stir in cheese cubes.
MICROWAVE 10 to 12 MINUTES on '8', or until mixture is heated through and cheese cubes have started to melt.
Let stand 10 minutes, covered.