Put everything in to the slow cooker and cook on HIGH for 3 hours or LOW for 5-6 hours.
Check the chicken is cooked through before serving. Slice and add back to the peppers.
NOTE: You may want to drain off some of the liquid as it can have quite a strong taste from the seasoning and make the chicken too wet.
OPTION: If you DO NOT want very soft peppers, and prefer them with a little texture, add them 30 minutes before the end of the cooking time, rather than at the start of cooking.
NOTE: Chicken breasts vary in size and shape which will impact the cooking time. As always, check that they are cooked through before serving.
Notes
Peppers: The type of peppers used are bell peppers