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