4 ounces uncooked spaghetti
Cooking spray
8 ounces lean ground turkey
1 1/2 cups prechopped onion, divided
1 cup chopped green bell pepper
1 tablespoon bottled minced garlic
1 tablespoon chili powder
2 tablespoons tomato paste
1 teaspoon ground cumin
1 teaspoon dried oregano
1/4 teaspoon ground cinnamon
1/8 teaspoon ground allspice
1/2 cup fat-free, less-sodium chicken broth
1 (15-ounce) can kidney beans, rinsed and drained
1 (14.5-ounce) can diced tomatoes, undrained
2 1/2 tablespoons chopped semisweet chocolate
1/4 teaspoon salt
3/4 cup (3 ounces) shredded sharp cheddar cheese