In a heavy pan (or cast iron), brown chorizo.
When chorizo is nicely browned, add diced onions, zucchini and diced tops of peppers to mix.
Brown veggies.
Taste mix.
If too bland, add spices and mix well. Chorizo should have given off enough oil to allow for enough liquid to combine spices with. If not, add a little olive oil or water.
Taste and add additional spices to your liking.
In a slow cooker, add peppers.
Pour enough water to cover 1" of the slow cooker.
Carefully add meat and veggie mix to peppers.
Cook on high for 2 hours, until peppers are soft.
Serve warm.