Mash chickpeas roughly in a bowl. Add cooked quinoa, chicken, egg whites, beets, oat bran, onion, prunes, poblano pepper, salt, chile powder, cumin, and black pepper. Mix well. Form into 6 equal-size patties. Wrap in aluminum foil.
½ cup dry quinoa, 1 (15.5 ounce) can chickpeas, 8 ounces ground chicken, ½ cup egg whites, ½ cup minced beets, ½ cup oat bran, ¼ cup minced onion, 3 prunes, minced, 1 tablespoon minced poblano pepper, 1 teaspoon salt, 1 teaspoon ground cumin, 1 teaspoon ground black pepper, 1 teaspoon ground chile pepper