Preheat the oven to 425 degrees F. In a food processor, combine garlic, 1 tablespoon salt, thyme leaves and mustard. Spread the mixture over the pork and allow it to sit at room temperature for at least 30 minutes.
In a food processor, combine garlic, 1 tablespoon salt, thyme leaves and mustard. Spread the mixture over the pork and allow it to sit at room temperature for at least 30 minutes. In the meantime, slice fennel bulbs into thick wedges. Toss the fennel, carrots, potatoes, and onions in olive oil, melted butter, salt, and pepper to taste.
This will keep the pork loin from soaking up too much fat. If you do not have a rack, cook your pork loin roast with vegetables! Simply scatter vegetables on the bottom of pan, and place the pork loin on top. Root vegetables like potatoes, carrots, beets and onions are perfect choices, even though they are not low carb.
Pour 2 cups of the wine into the pan and cover the whole roasting pan tightly with aluminum foil. Roast for 2 1/2 hours, remove the foil, and roast for another 4 to 4 1/2 hours, until the meat is very, very tender when tested with a carving fork. Every 2 hours, add another cup of wine to keep some liquid in the pan.