Preheat the grill to high heat.
In a large bowl, combine the minced meat, onions, parsley, allspice, black pepper, salt, and cayenne pepper. Before adding the onions and parsley to the meat, squeeze them firmly between your palms to remove excess moisture. Mix everything thoroughly until the ingredients are evenly incorporated.
Divide the mixture into 15 equal portions, each about the size of a golf ball. Insert a skewer into each portion and use your palms to shape the meat around it into a long, even log.
Repeat with the remaining portions.
Grill the kafta skewers to your desired doneness, turning them as needed until nicely browned and cooked through. Serve hot with hummus and grilled tomatoes.