These lentil burgers are a tasty vegetarian alternative to traditional beef burgers. Made with cooked lentils, breadcrumbs, egg, onion, and spices, these burgers are easy to make in a food processor. Simply pulse the ingredients together until they form a thick mixture, then shape into patties and cook on a grill or stovetop. Serve on a bun with your favorite toppings for a delicious and healthy meal.