In a medium pot, cook quinoa with onion, tomatoes, chilis, salt, paprika, chipotle, and cayenne.
Preheat oven to 415º.
Cut off the tops of each bell pepper and remove seeds and ribs. Cut up what is left over from the tops of each pepper. Finely dice and mix into quinoa.
Stuff each pepper with the cooked quinoa mixture.
While the peppers are baking, mix up the sauce. In a blender or food processor, add avocado, lemon juice, cilantro, vegannaise, nutritional yeast, and sea salt.
Bake on a foil lined baking sheet for 30 minutes.
Garnish with cilantro, sauce, and leftover bell peppers.