Spray your slow cooker with cooking spray. Place chicken across the bottom of the slow cooker, as evenly as possible. In a bowl, combine the soy sauce, salsa, onions, peanut butter, lemon juice, Thai chili sauce, garlic, ginger and jalapeno, if you are using it. Pour all over chicken. Cover and cook on low for 5-6 hours or until chicken is done. Sprinkle with green onions and sesame seeds. Serve with rice or noodles if desired.