Serving suggestion:
Arrange thick slices of the pork belly on a serving platter, surrounded by the spiced avocado slices. Serve the avocado mustard sauce on the side. This dish pairs well with roasted root vegetables or a fresh green salad.
Prepare the pork belly: Score the pork skin in parallel lines 1 cm apart using a sharp knife.
Cover the pork and refrigerate it for at least 4 hours or overnight to dry out the skin. Preheat the oven to 180°C. Scatter the peeled garlic cloves over the base of a baking dish. Rub the oil all over the pork, followed by half of the sea salt flakes.
Place the pork skin-side down on top of the garlic and sprinkle with cumin. Roast for 1 hour.
To create the crackling, Increase the oven temperature to 230°C. Turn the pork over and sprinkle with the remaining salt. Tuck the sage underneath the pork and roast for about 1 hour, or until the skin is golden and crunchy. If any areas brown too quickly, cover them with foil.
Make the sauce: Combine the condensed milk, white wine vinegar, whole grain mustard, milk, and mashed avocado in a blender. Blend until smooth—season with salt and pepper to taste.
Prepare the spiced avocado: In a shallow dish, mix together the paprika, Cajun spice, and chilli flakes. Press the avocado halves cut-side down into the spice mix, then slice thickly.