Mexican potatoes and corn

An easy, meatless but filling weeknight supper (I'll post a crock pot recipe soon too!):

1 10oz. package forzen corn kernels, thawed
1 16oz. can black beans, drained
1/4 cup chopped onion or 3 scallions, chopped white part
1 1/2 lb. potatoes, scrubbed but not peeled and cut into half-inch cubes
1 green pepper, chopped (I skip this)
1/2 tsp. chili powder
1/3 c. taco sauce or salsa.
2-3 cups grated cheddar or Monterey Jack cheese or a blend.

Mix onions with corn and beans and mound in center of a large microwavable platter or casserole. Mix potatoes, green pepper, and chili powder in a bowl, then arrange around edges of corn mixture. Spoon taco sauce or salsa over all.

Cover tightly with plastic wrap, turning back on corner slightly to vent steam. Microwave on high for 12-16 minutes, rotating platter halfway through cooking time. Let stand one minute.

Carefully uncover plastic wrap. Stir gently to mix vegetables and sauce. Sprinkle dish with grated cheese. Microwave uncovered for another 30 seconds or until cheese is melted. Serve with freshly chopped tomatoes, extra salsa, sour cream and a salad.