Jamaican Jerk Chicken

Name: Jamaican Jerk Chicken
Prep time: 20 min
Total time: 20 min
Cuisine: Caribbean
Ingredients: 4 Scotch bonnet peppers or habanero chiles, seeded; 1 bunch scallions, roughly chopped, plus more sliced for serving; 12 cloves garlic, peeled; 1 (2") piece ginger, peeled; 1/4 c. dark brown sugar; 1/4 c. pineapple juice (optional); Juice of 2 limes; 12 sprigs thyme; 12 allspice berries or 2 tsp. ground allspice; 2 tsp. ground allspice or 10 whole allspice berries; 3 bay leaves; 2 tsp. ground nutmeg; 1 1/2 tsp. kosher salt; 1 tsp. black peppercorns; 1 tsp. ground cloves; 1/4 c. reduced-sodium soy sauce, plus 2 tbsp. for sauce (optional); 4 lb. boneless or bone-in, skin-on chicken breasts and/or thighs; 1/4 c. ketchup (optional); Neutral oil, for grill; Lime wedges, for serving