This smashed bean burger is the perfect vegan patty for those who like it spicy, hearty, and simple. Black beans and roasted mushrooms form the base, refined with onions, spices, and breadcrumbs. After forming, the patty is smashed directly in the pan and seared on both sides, creating a wonderful roasted flavor. It's served with a homemade burger sauce made from mayo, ketchup, vinegar, and pickles. Served with caramelized leeks and a fresh bun, this burger is sure to please even meat lovers. Perfect for your next barbecue or a quick after-work snack!