Rough chop an onion and set aside
Coat the roast with salt and pepper
Heat up bacon fat in a frying pan and sear the roast on all sides, 1 to 1:30 minutes on each side
Place the meat in the crockpot
Fry onions in the leftover grease, pour over meat
Mix Mustard, Garlic, Worcestershire, Vinegar, Spenda and Liquid smoke
Pour sauce over the meat
Cook in crockpot on low, 1 to 1 hour 15 minutes per lb of roast.