01 - Set oven to 375°F (190°C) and allow to preheat thoroughly.
02 - Slice each bell pepper in half lengthwise and remove seeds and membranes.
03 - In a large mixing bowl, combine cooked quinoa, black beans, sweet corn, and half of the salsa. Stir until evenly blended.
04 - Evenly divide the quinoa mixture among the pepper halves, gently pressing to fill completely.
05 - Arrange stuffed peppers in a baking dish, pour the remaining salsa over the top, and cover dish tightly with aluminum foil. Bake for 30 minutes.
06 - Remove foil and bake an additional 10 minutes for a lightly roasted finish. Let cool slightly before serving.