HEAT 1-1/2 tsp. oil in large skillet. Add peppers; cook 6 min. or until crisp-tender, stirring occasionally. Spoon half into 6-cup ring mold sprayed with cooking spray. Spoon remaining peppers into bowl; cover to keep warm.
HEAT remaining oil in same skillet. Add onions and garlic; cook and stir 2 min. Add wieners and corn; cook 5 min. or until wieners are lightly browned, stirring occasionally. Stir in rice and remaining peppers; cook 3 min. or until heated through, stirring frequently.
STIR in cheese; immediately spoon over peppers in mold. Press firmly into mold with back of spoon. Unmold onto plate.