Start preparing the boiled pork belly roll. Place a pot of water on high heat. Add salt. Wait until the water boils. While the water is boiling, prepare the meat. In a bowl, mix the chopped garlic, thyme, and ground black pepper. Rub the pork with the mixture on all sides.
Cook the roll. Roll the belly into a roll and tie it with twine. Put the meat in a pot with boiling water. Reduce the heat to minimum and cover with a lid. After 1.5 hours, take the roll out and put it in a bowl. Put a plate on top and press it down with a press, for example, a two-liter bottle of water. Let the roll cool, then put it in the refrigerator. Slice the finished roll thinly.