MORNING

Stir together chili powder, salt and cumin. Put pork in crock pot and pour mixture over pork and turn to coat. In a large skillet, brown the pork in the vegetable oil and return to the slow cooker. Pour 1/2 cup water into skillet to scrape up the bits in the bottom.  Add the  water and the pineapple to the pork and tuck the chiles into the meat. Pour over pork. Cook for 8 hours on low.

EVENING

Cook rice. Using a slotted spoon, transfer the pork and pineapple to a bowl. Remove the chilies.Puree the sauce with an immersion blender.Return pork and pineapple to the cooker. Seerve over rice.