Remove seasoned pork from fridge and let come to room temp, about an hour. Pre-heat dutch oven over high heat until extremely hot. Add 1-2 tablespoons of oil and sear the pork pieces until nicely browned, about 3-4 minutes per side. Remove pork and set aside. Add onions and garlic, and continue to saute another minute, and cut heat to low. Deglaze with about a half cup of the stock, scraping free the brown bits from the bottom of the pot. Add the rest of the stock, the orange juice, cider vinegar, and place the pieces of pork snugly in the braise bath. The liquid should come about halfway up the pork.