How to Make It
In a large pot of boiling water, cook the spareribs over moderate heat for 25 minutes. Drain and let cool.
In a food processor, combine the chopped scallions with the garlic, chiles, onion, vegetable oil, soy sauce, Chinese five-spice powder, ground allspice, lime juice, salt and pepper and process the mixture to a paste.
Set the spareribs on 2 large rimmed baking sheets and spread the jerk paste all over them. Cover and refrigerate overnight. Bring to room temperature before grilling.
Light a grill. Grill the spareribs over a medium-hot fire, turning them frequently if they are browning too fast, until lightly charred and crisp, about 25 minutes. Transfer the ribs to a cutting board and let rest for 10 minutes. Cut in between the ribs, arrange on a platter and serve.