In a large pan over medium heat, sauté the garlic, onion, bell pepper, jalapeño and corn for 4-5 minutes. This will help soften the veggies and release their flavors.
In the base of a food processor, combine 2 cups of cooked quinoa, black beans, the sautéed veggies, fresh cilantro, 1/3 cup of the plain bread crumbs, flour and spices. Blend the mixture on low for 15-20 seconds, stop and scrape down the sides with a rubber spatula and blend for another 15-20 seconds. You want the quinoa, veggies and beans to start to form a ball, but you still want some larger pieces of corn, black beans and veggies throughout for texture.
Use a scale to weigh out each burger and then form into a patty shape. The veggie burger mixture should weigh around 28 ounces (may vary slightly) and will yield four 7 ounce patties or six 4.5(ish) ounce smaller patties.
On a plate, combine the remaining regular breadcrumbs with the panko breadcrumbs. Gently roll each veggie burger in the bread crumbs, being sure to get the top, bottom and side. Gently press the breadcrumbs into the veggie burgers to help them adhere.
Heat 1/4 cup avocado oil in a large pan over medium heat. Add the veggie burgers and cook for 4-5 minutes, flip and cook on the other side another 5 minutes, or until both sides are golden brown and crispy.
Assemble your burgers with buns and your favorite fixings, such as lettuce, tomato, onion and avocado.