Jamaican Jerk Chicken

Name: Jamaican Jerk Chicken
Prep time: 25 min
Total time: 25 min
Cuisine: Caribbean
Ingredients: 1 small yellow onion, chopped; 5 scallions, chopped, plus more for serving; 4 Scotch bonnet peppers or habanero chiles, seeded and deveined; 12 cloves garlic; 1 c. pineapple juice; 1/4 c. brown sugar; 1/4 c. chopped fresh ginger (from about 2 [2"] pieces); 1/4 c. low-sodium soy sauce; 12 sprigs fresh thyme; 3 bay leaves; 2 tsp. ground allspice or 10 whole allspice berries; 1 tsp. garlic powder; 1 tsp. ground nutmeg; 1 tsp. onion powder; 1 tsp. whole cloves; 1 1/2 tsp. kosher salt, divided; 1 1/2 tsp. freshly ground black pepper, divided; 1 (3 1/2- to 4-lb.) whole chicken, cut into pieces, or 4 lb. mixed chicken parts; Vegetable oil, for grill; 1/4 c. ketchup (optional); 2 tbsp. soy sauce (optional); Lime wedges, for serving