Step 1

The day before, use a sharp knife to score a diamond pattern into the skin of the pork. You want to cut down into the fat but not into the meat. Sprinkle the skin liberally with salt (at least 1 tbsp for a kilo of meat), making sure it gets inside the cuts you just made. Put the pork belly in the fridge, uncovered with the skin-side up, for at least 12 hours.

Step 2

Preheat your oven to 325 F. Lay the lemon and onion slices in an alternating single layer on a baking sheet. Lay the bay leaves on top. Mix together the kosher salt, black pepper and garlic powder and sprinkle it onto the meat side of the roast. Put the roast skin-side up on top of the lemon, onion and bay leaves. Roast for 2 1/2 hours.

Step 3

While you're waiting, put the parsley, shallot, garlic, oregano and pepper flakes in a pestle and mortar. Add a good pinch of salt and smash into a chunky paste. Add the lemon juice, Worcestershire sauce, vinegar and olive oil and whisk lightly to combine everything. Refrigerate the chimichurri until you're ready to serve.

Step 4

Pull the pork belly from the oven and turn the heat up to 450 F. Once it reaches temperature, put the pork back in and roast for 30 minutes until the skin is super crispy. Let the pork rest for 15 minutes before carving. Don't forget the chimichurri.