Heat olive oil in a large skillet over medium high heat. Add bell peppers, onion and garlic; cook until vegetables are tender and lightly browned, about 5 minutes. Stir in chili powder, cumin and smoked paprika; season with salt and pepper to taste. Cook for an additional minute.
Divide cooked quinoa or brown rice among four bowls. Top with cooked vegetables, black beans or pinto beans.