In a large frying pan on medium-high heat, saute the onion, garlic, and bacon until the onion softens, about 6 minutes. Transfer to your crockpot.
Add the rest of the ingredients to the crockpot, and stir well. Use your spoon to break up that miso paste a bit. Cook on high for one hour, then give everything a good stir and turn the heat to low. Cook for two hours more.