4 Ingredient Salsa Black Bean Burgers are a quick and easy vegetarian option for burger lovers. Made with just four simple ingredients - black beans, salsa, breadcrumbs, and egg - these burgers are packed with flavor and protein. They are perfect for grilling or pan-frying, and can be served on a bun with your favorite toppings, such as lettuce, tomato, and avocado. These burgers are a delicious and healthy alternative to traditional beef burgers.