In a large bowl, whisk together the honey, soy sauce, rice vinegar, sesame oil, minced garlic, grated ginger, peanut butter, and chicken broth until well combined.
Place the chicken breasts in the bottom of the crockpot.
Pour the honey ginger peanut sauce over the chicken in the crockpot, ensuring that all the chicken pieces are coated.
Cover the crockpot and cook on low heat for 4 hours or on high heat for 2 hours, until the chicken is cooked through and tender.
30 minutes before it's done, add broccoli and pepper
Garnish with sliced green onions, sesame seeds, and chopped cilantro, if desired