M&S sell a pork belly joint seasoned with salt and pepper. We have this quite often, and I use the same technique each time. In a roasting pan I add a bed of cut vegetables. The actual composition does depend on what’s in the fridge. This time I used apple, onion, carrots, a garlic bulb cut in half, and some mushrooms. I drizzled some garlic olive oil as well over the joint.
I start off with a hot (fan) oven, about 200℃ and roast the pork belly for about ten minutes before turning the heat down to 160℃. I usually cook the join for about ninety minutes. The plan is to slow roast the joint to make it tender. A hot fast roast will result in a shorter cooking time, but the meat will be tough and chewy (and probably a little fatty).
I leave the joint to rest for about twenty to thirty minutes, which gives me time to increase the heat in the oven to finish off the roast potatoes and roasted vegetables. I will usually use the roasting pan juices to make some gravy.
I slice the joint into thin slices and serve with roast potatoes and vegetables.