HEAT oven to 375°F.
MIX cream cheese spread and egg in large bowl until blended. Stir in rice, corn, 3/4 cup shredded cheese and cilantro.
SPOON into 1-1/2-qt. casserole sprayed with cooking spray; top with remaining shredded cheese.
BAKE 20 to 25 min. or until is casserole is heated through and shredded cheese is melted.