For the crispy pork belly, rinse the pork belly in cool water and place in a saucepan of cold water. Peel the onion, lard with the cloves and bay leaves and add to the pork belly.
Bring the water to a boil and cook over medium heat for about 40 minutes. Remove the pork belly and make a diamond-shaped incision in the skin with a sharp kitchen knife.
Bring the honey, beer and soy sauce to a boil with the thyme and rosemary.
Place the pork belly, skin side up, on a baking tray and cook in a preheated oven at 220 °C for about 40 minutes. Brush frequently with the beer glaze.
Then take it out, let it rest for 5 minutes and bring the crispy pork belly thinly sliced to the table.