Place adobo with chipotle sauce, oregano, cumin, garlic and salt into a blender and pulse until ingredients create a paste.
Season pork belly with paste and then place in an air tight container and place in the fridge to marinate for at least 4 hours, overnight is preferable.
Once meat has absorbed the flavors of the marinade, transfer to a roasting tin and cover with foil.
Bake in a preheated oven at 375 for 1 hour.
Once the pork belly is cooked, remove the foil and raise the temperature in the oven to 425 and cook for a further 15-20 mins.
Remove from the oven once the pork belly is browned just enough before the skin becomes crispy.
Let the pork belly rest while you create your pico de gallo.