Mix together 1 onion, 1-3 jalapeños, 1-3 garlic cloves (all this minced), and orange zest. Put some on bottom of crock pot, then add pork, & some more mix on top of pork. Cut orange into 4 pieces- squeeze juice over top of pork & then put orange sections in each corner.

Cook on low 8-10 hrs. If there's a fat cap on pork, I put that side up. If a lot of fat, may need to remove this after cooking