In the bowl of a food processor, pulse garlic, red onion, and cilantro until finely minced.
Add chickpeas, panko breadcrumbs, tahini, salt, and pepper to the food processor and process until a large ball forms.
Shape the mixture into burger patties, approximately 3-4 inches (8-10 cm) wide and ½ inches (1 cm) thick. Transfer to a lined baking tray and freeze to firm up for 30 minutes (this is optional).
Heat oil in a frying pan over medium-high heat. Place all 4 burgers in the pan and fry, turning regularly, until browned and crispy on each side, approximately 4 minutes per side.
Alternatively, you can bake the burgers at 350ºF (180ºC) for 15 minutes, then flip them and continue baking for an additional 15 minutes.
Generously brush the burgers with BBQ sauce, ensuring they are fully coated (this is also optional).
Serve on hamburger buns with vegan mayo, crispy lettuce, sliced tomato, and sliced red onion, or with your favorite toppings.