01 -
Mash black beans in a large bowl with a fork or potato masher until mostly smooth, leaving some chunks for texture.
02 -
Add cooked quinoa, red bell pepper, red onion, garlic, fresh cilantro, breadcrumbs, egg or flax egg, cumin, smoked paprika, chili powder, salt, and black pepper to the mashed beans. Mix thoroughly until a cohesive mixture forms.
03 -
Divide the mixture evenly into four. Form each portion into a patty approximately 2 cm thick.
04 -
Preheat a grill or skillet over medium heat and brush the surface with olive oil.
05 -
Place patties on the grill or skillet and cook for 5 to 6 minutes per side, or until firm and well-browned. Handle carefully while flipping.
06 -
Briefly toast the burger buns if desired.
07 -
Place each patty on the bottom half of a bun. Layer with lettuce, tomato, red onion, avocado, and your preferred sauce. Cap with the remaining bun halves and serve immediately.