In large frying pan, saute pork with green pepper and onion until pork is cooked through. Sprinkle with cumin and garlic powder and heat for a few more minutes to combine flavors. Combine cooked rice with black beans and corn, add pork mixture.
Turn mixture into 11 x 14 casserole dish. Sprinkle with Kraft Shredded Cheddar Cheese.
Bake in 350°F oven for 20 minutes until hot. Serve with dollop of sour cream.