My friend Phil gave me a super easy pork shoulder recipe a while back. And there was a half pork shoulder at C-town for $4. Awesome!
Pernil Pork Shoulder recipe:
1. wash the pork shoulder and score it with a knife with good deep cuts
2. pour white vinegar over it and get it nice and wet
3. pat down a lot of Adobe seasoning (optional: salt and stick garlic cloves in the scores)
4. put it in the oven at 450 degress for about an hour. then turn down to 350 for another 3-4 hours. Get a meat thermometer to check. (I did a full pork shoulder about a year ago. I feel like it took just a little longer in the oven.)