Preheat oven to 350 degrees F. Slice each poblano pepper in half lengthwise and place in 9x13 inch pan.
Add black beans, corn, onion, sweet potato, tomato salsa, chili powder, cumin and oregano.
Divide evenly into each poblano pepper half. Cover pan with foil and bake for 40 minutes or until peppers are fork tender
Remove foil, sprinkle cheese on each pepper (about 1 1/2 tablespoons on each) and bake for another 5 minutes.
Remove from oven and sprinkle with cilantro. Serve with guacamole and extra salsa, if desired. Makes 10 poblano halves. 1 serving = 2 poblano halves.