Combine the quinoa, water, onion, garlic, red pepper, black beans, enchilada sauce, diced tomatoes, green chiles, corn, lime juice, cumin, chile powder, and cilantro in a slow cooker. Stir to combine. Season with salt and pepper, to taste. Cover and cook on high for 3 hours or on low for 6 hours, or until the liquid is absorbed and quinoa is cooked.