I made this for Sara for Mother's Day and thought it was worth saving/sharing.
1 onion sliced
3 lbs pork tenderloin
3 tablespoons minced garlic
1/2 cup orange juice
1 orange sliced
3 tablespoons vinegar
3/4 cup lemon juice
1 tablespoon ground cumin
1 tablespoon grill seasoning (I used Montreal Steak)
1 tsp salt
3/4 tsp ground red pepper
3 bay leaves
Basically you just add all of the above to a crock pot and let it cook for 3-4 hours on high. It has a tangy flavor with a little bit of spice. The recipe has a Cuban flavor to it.
Adapted from: http://allrecipes.com/recipe/havana-slow-cooker-pork-tenderloin/