Prepare the peppers by slicing off the tops and removing the seeds and ribs inside. Don’t toss the tops—save them to chop for salads or stir-fries later!
In a large mixing bowl, stir together quinoa, black beans, refried beans, enchilada sauce, spices, and 1 cup of shredded cheese.
Fill each pepper to the brim with the quinoa mixture. Pack it in lightly so the filling stays moist.
Pour 1/2 cup of water into the bottom of your slow cooker to create steam.
Place the stuffed peppers in the crockpot, sitting upright. Cover and cook on low for 6 hours or high for 3 hours.
Once cooked, sprinkle the remaining cheese over the peppers. Cover for another 5 minutes until the cheese melts.
Serve hot with your favorite toppings like fresh cilantro, avocado slices, or a dollop of sour cream.