Combine the beans and chipotle pepper with about 1 cup water in a food processor and blend until desired texture.
Add all other ingredients into slow cooker, as well as the bean mixture, and mix to combine.
Cook in slow cooker for at least 4 hours.
After 4 hours, check seasoning and add salt and/or pepper to desired taste.
Recipe Notes
In America, there are tins of tomato sauce. For you Australians, this is NOT the stuff you put on hot dogs etc, it is more like the Italian tomato passata.