Ohio Turkey Chili

Name: Ohio Turkey Chili
Ingredients: 2 tablespoons vegetable oil; 1 yellow onion, finely chopped; 2 cloves garlic, minced; 1 pound ground turkey (80 percent lean); Kosher salt and freshly ground black pepper; 2 tablespoons tomato paste; 1 tablespoon chili powder; 1 tablespoon paprika; 1 teaspoon ground allspice; 1 teaspoon ground cinnamon; 1 teaspoon ground coriander; 1 teaspoon ground cumin; 1/4 teaspoon ground cloves; One 15-ounce can diced tomatoes; 1 tablespoon cider vinegar; 2 teaspoons Worcestershire sauce; 1 ounce unsweetened chocolate, finely chopped; 12 ounces spaghetti; 8 ounces shredded Cheddar; Thinly sliced green onions, for topping, optional