For a vegetarian option, this black bean veggie Thermomix recipe is a great choice. In your Thermomix, blend together black beans, breadcrumbs, onions, and your choice of seasonings to form the burger patties. Cook the patties in the air fryer until crispy on the outside and tender on the inside. Serve the black bean veggie burgers on toasted buns with your favorite toppings, such as avocado, lettuce, and tomato. Enjoy a flavorful and satisfying meatless burger.