Slow Cooker Sweet and Sour Chicken

Slow Cooker Sweet and Sour Chicken Ingredients: - 1 ½ lbs boneless, skinless chicken breasts, cut into bite-sized pieces - 1 red bell pepper, chopped - 1 green bell pepper, chopped - 1 small onion, chopped - 1 cup pineapple chunks (canned or fresh) - ½ cup pineapple juice (from canned pineapple or fresh) - ⅓ cup rice vinegar - ⅓ cup ketchup - ¼ cup soy sauce - ¼ cup brown sugar - 2 cloves garlic, minced - 1 teaspoon grated ginger - 2 tablespoons cornstarch - 2 tablespoons water - Cooked rice, for serving - Sesame seeds and green onions, for garnish (optional)