In a mixing bowl, mash the black beans with a fork until mostly smooth.

Add cooked quinoa, chopped onion, minced garlic, grated carrot, bread crumbs, cumin, paprika, salt, pepper, and beaten egg. Mix until well combined.

Form the mixture into 4 equal patties.

Heat a skillet over medium heat and add a little oil.

Cook the patties for about 5-7 minutes on each side, or until golden brown.

If using cheese, place a slice on each patty during the last minute of cooking to melt.

Toast the burger buns lightly on the grill or in the skillet.

Place a patty on each bun and top with lettuce, tomato, pickles, ketchup, and mustard as desired.

Serve immediately and enjoy!