Sauté the Aromatics: Heat olive oil in a skillet over medium heat. Cook onion until translucent (5 min), then garlic (1 min).
Mash the Beans: In a large bowl, mash black beans until mostly smooth with some chunks.
Combine the Ingredients: Add quinoa, sautéed aromatics, breadcrumbs, spices, salt, pepper, and egg.
Mix Well: Combine thoroughly using hands or spoon.
Form the Patties: Shape into 4–6 patties, about 1 inch thick.
Chill the Patties (Optional): Refrigerate for 30 minutes to firm up.
Cook the Burgers:
Grill: 5–7 min per side on medium heat
Bake: 375°F (190°C) for 20–25 min, flip halfway
Pan-Fry: 5–7 min per side in skillet with olive oil
Serve and Enjoy: Serve on buns with toppings of choice.