Add all ingredients to a slow cooker and turn on high. After 2 - 3 hours, turn the crockpot down to low and keep covered for another 4 - 6 hours. (Alternately, you could just leave the slow cooker on low for 8 hours).
Before you're ready to serve, remove the lid and turn back to high for another 30 minutes. Taste and adjust seasonings as needed!