Trim the pork loin of any excess fat you don't want.
Mix the marinade ingredients together in a small bowl.
Put the meat into a vacuum-sealable bag and add the marinade. Seal the bag.
Put the bag in a large container with water and the sous vide immersion cooker. Set it according to manufacturer directions to 144°F / 62°C for 3 hours. Add an additional 30 minutes if the roast is frozen.
When the roast is done, remove it from the bag and wipe it down with a paper towel.
Heat a cast iron grill to smoking. The roast should rest while that is happening.
Before you put the roast on the grill, rub a little olive oil on it and sprinkle it generously with the Black Magic seasoning.
Put it on the grill and sear it, turning it every 30 seconds or so until the roast is completely seared.
Let it rest for 10 minutes, uncovered, before carving and serving.
Enjoy!
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