Prepare the marinade. Add the onion, scallions, Scotch Bonnet Chiles (or Habaneros), garlic, Chinese five-spice, pepper, nutmeg, thyme, salt, and sugar to the bowl of your food processor with the ground allspice berries. Pulse and process until everything is coarsely chopped and combined. With the food processor running, add 2 tablespoons of olive oil and the soy sauce to the marinade. Remove lid and double-check that all the ingredients have been fully processed. Set aside.