Kale With Pork Loin

Pour brine ingredients into a large saucepan, place over high heat and stir until salt has dissolved. Place the saucepan in a sink of cold water until cool. Place the pork loin in a deep non-metallic container, large enough to fit the pork snugly. Pour over enough brine to cover the pork, cover the container and leave overnight in the fridge. Two hours before cooking, remove from fridge, drain brine away and cover pork to bring to room temperature.
Preheat oven to 110˚C. Pat loin dry with paper towel, place a very large frying pan or metal roasting pan over medium-high heat, add butter and the pork loin, and fry until lightly browned all over. Transfer to a baking paper-lined oven tray and cook for 1-1 ½ hours, or until the meat reaches 65˚C with a digital thermometer. Remove from oven and allow to rest for at least 15 minutes so the juices settle before cutting and serving.
While the pork is resting, strip the kale from the stems and roughly chop. In a large saucepan, sweat speck and onions with butter over medium heat until onion is tender. Add kale and cook, stirring until just wilted, 3-5 minutes.
Meanwhile, drain cannellini beans, rinse, drain again, then lightly mash before stirring through the kale. Season with salt, pepper and maybe a little more butter. Serve with pork loin.