Rub roast with olive oil. Cover with salt, black pepper and garlic.
Place meat into large plastic bag and seal tightly. Place in Sous Vide bath at 130 for rare, 135 for medium rare or 140 for medium. Let sit in bath for 30 hours.
After 30 hours remove from bag. Melt lard in skillet. Add roast and brown on all sides. About 2 minutes per side.