HEAT oven to 400ºF.
PREPARE corn muffin batter as directed on package; spread into greased 12-inch pizza pan. Bake 8 to 10 min. or until lightly browned. Meanwhile, combine peppers, corn and beans in medium saucepan. Add seasoning mix and water; cook 10 min., stirring occasionally.
SPRINKLE 1 cup cheese onto crust; top with bean mixture and remaining cheese.
BAKE 4 to 5 min. or until cheese is melted.