Bring a 5 quarts pot of water to boil and blanch the halved peppers. To blanch, simply just place the cut peppers one or two at a time in the hot water for 1-2 minutes to slightly soften the skins. Remove to a paper towel to dry, then place cut side up in a baking dish or oven proof skillet.
In a small pot bring the 1 1/4 cups water to a boil and add the Tricolor Cousous, bring it back to a boil, then cover and reduce heat and simmer for 10 minutes or until the Couscous has absorbed all the water.
Preheat oven to 350 degrees.
While the Couscous is cooking, prepare the rest of the filling. Place the black beans, corn, garlic, and cilantro in a large bowl and mix in the cooked Couscous.
In a small bowl combine the lime juice, cumin, salt and chili powder, then drizzle over the couscous mixture and stir to combine.
Spoon the mixture into the prepared peppers and sprinkle the tops with cheese.
Bake in the oven for 20-25 minutes
Remove from oven and let cool slightly. You can serve this with salsa and sour cream on top, which is fabulous as well.