1. Stir soup, sour cream, black pepper, vegetables, 2/3 cup onions and 1/4 cup cheese in 2-quart casserole. Cover casserole.
2. Bake at 350 degrees F 40 minutes or until vegetables are tender. Stir vegetable mixture.
3. Top with remaining onions and cheese. Bake 5 minutes or until cheese is melted.