Pat the roast dry and allow to sit at room temperature for at least an hour. Preheat oven to 350 degrees Fahrenheit. In the meantime, using a mortar and pestle or a spice grinder, combine and pulverize the salt and juniper and separately, the herbs de provence and peppercorns. Prick the roast all over with a boning knife, penetrating 1"-1.5" each time, the same number of times as you have pieces of garlic. Stud the roast, placing 1 clove (or half clove) into each of the incisions you've just made, and press it all of the way in. Sprinkle evenly with the salt and juniper preparation. Repeat with the herb and pepper mix. Heat the oil and bacon drippings in a heavy bottomed skillet, rondeau pan, or Dutch oven, over medium high heat until glistening. Sear the leg on all sides, taking care while turning not to damage your ethereal crust. Sear the cut sides of the apples in the same pan, then add the figs just to coat. Lightly sprinkle the fruit with salt and pepper, or your prepared mixes if there is enough excess, and set aside. Combine the onion, rosemary, and sage, and place in the bottom of a roasting pan. Place the leg on top of this mixture, then arrange the fruit around its perimeter. Place in the oven, and using convection if possible, roast to an internal temperature of 125 to 130 degrees Fahrenheit, about an hour or so. Err on the side of “underdoneness”, as you can always pop it back in the oven for another bit, but an overcooked leg of venison is a woeful thing indeed. Let the joint rest for 30 minutes.

If employing the manche a gigot, attach it at this time to the exposed end of the shank bone, and you're ready to carve.