In a large bowl, mash the black beans using a fork or potato masher, leaving some chunks for texture.
Mix in the cooked quinoa to your mashed beans.
Toss in minced garlic, chopped cilantro, cumin, chili powder, salt, and pepper.
Beat the egg lightly in a separate bowl and add it to the mix.
Gradually fold in the breadcrumbs until the mixture holds together.
Shape the mixture into four equal-sized burger patties.
Heat olive oil in a skillet over medium-high heat.
Place the patties in the skillet. Cook for 5 minutes on each side or until they have a golden-brown crust.
Remove the Spicy Black Bean and Quinoa Burger patties from the skillet and place them on a plate lined with paper towels to absorb any excess oil.