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

Add the cooked quinoa, corn, bell pepper, onion, garlic, cumin, paprika, salt, and pepper. Mix well.

Stir in the breadcrumbs until the mixture holds together.

Divide the mixture into 4 equal portions and shape each into a patty.

Heat olive oil in a skillet over medium heat. Cook the patties for about 5-7 minutes on each side, until golden brown.

Toast the burger buns if desired. Place a patty on each bun and top with lettuce, tomato, pickles, and any other desired toppings.

Serve with ketchup and mustard on the side.