In a medium bowl, whisk together peanut butter, soy sauce, honey, vinegar or lime juice, and sesame oil until smooth. Then, add minced garlic, minced ginger, chili flakes, and enough water or broth to achieve desired consistency.

Place the chicken at the bottom of your slow cooker. Pour the peanut sauce over the chicken, ensuring it is well coated.

Cover the slow cooker and cook on low for 4-6 hours or high for 2-3 hours, checking doneness around the 2-hour mark on high or 4-hour mark on low.

Shred the cooked chicken inside the slow cooker using two forks and stir to coat evenly with the sauce.

Serve hot over rice or lettuce wraps, garnishing with crushed peanuts, chopped cilantro, or sesame seeds.