Heat your oven and prep a 9×13 baking dish with a light coat of cooking spray. Set it aside.
Cook your quinoa according to package directions, then set it aside to cool slightly.
Warm the olive oil in a large skillet over medium-high heat. Toss in the onion, garlic, and jalapeño and cook, stirring occasionally, until everything softens up nicely.
Add the bell peppers and corn to the skillet. Let them cook for 3 to 4 minutes, then squeeze in the lime juice and add the cumin, chili powder, and cilantro. Stir everything together and season with salt and pepper to taste.
In a large mixing bowl, combine the cooked quinoa and black beans. Fold in the sautéed veggie mixture, pour in the enchilada sauce, and stir until everything is evenly coated. Mix in half a cup of shredded cheese.
Pour the filling into your prepared baking dish and spread it out evenly. Scatter the remaining cheese generously over the top.
Cover the dish tightly with foil and bake for 20 minutes. Remove the foil and continue baking for another 10 minutes, until the cheese is golden and the edges are bubbling.
Pull it from the oven and let it rest for about 10 minutes before slicing and serving.