These skewers are a fun and easy way to grill up flank steak for a summer barbecue. The steak is marinated in a mixture of olive oil, garlic, and spices, then skewered with vegetables like bell peppers, onions, and cherry tomatoes. Grill until the steak is cooked to your liking and the vegetables are charred and tender. Serve with a side of grilled bread or a simple salad.