For the pork belly: Combine the olive oil, juniper berries, rosemary, sage and thyme in a mixing bowl. Add the pork belly, cover, and let marinate in the refrigerator for at least 3 hours or up to 6 hours.
Preheat the oven to 375 degrees F.
Heat a heavy-bottomed pan over medium heat. Remove the belly from the marinade (reserve the marinade) and sprinkle liberally with salt and pepper. Coat the pan with the vegetable oil and carefully sear on both sides until well browned. Remove the belly and reserve.
Add the celery, bay leaves, carrots, garlic, onions and reserved marinade into the pan and cook until the vegetables are lightly browned. Pour in the wine to deglaze, followed by the ginger beer, and then scrape the pan to release the browned bits. Add the stock and the belly, cover, and braise in the oven until fork tender, about 3 hours (time will vary depending on the size of the belly).
For the grits: Combine the milk and stock in a pot. Bring to a boil, and then reduce to a simmer and slowly whisk in the grits. Simmer, stirring often, until tender, about 45 minutes. Stir in the butter, and season with salt and pepper.
Remove the pork belly from the braising liquid. Strain the liquid through a fine mesh sieve into a saucepan. Skim all the fat from the surface, and then cook over medium-high heat until reduced by 40 percent.
Before serving, gently reheat the pork belly in the jus. Serve over the grits and pour a little jus over. Toss the arugula with a little lemon juice and olive oil and place on top.
This recipe was provided by a chef, restaurant or culinary professional and may have been scaled down from a bulk recipe. The Food Network Kitchens chefs have not tested this recipe, in the proportions indicated, and therefore, we cannot make any representation as to the results.