Preheat the oven to 200°C 400°F.
Add the roasting pan to the oven to heat as well.
Add the potatoes to a cooking pot. Season with salt and pour enough water to coat the potatoes.
Boil the potatoes for 10 minutes.
Add 2 tablespoons of olive oil and 2 tablespoons of red wine vinegar to the hot pan. Shake the pan to spread.
Transfer the potatoes to the pan using a slotted spoon.
Sprinkle with 1 teaspoon dried oregano and season with ground pepper.
Toss the garlic cloves in the pan.
Lay the pork belly slices on top of the potatoes.
Bake for 20 minutes on the second top rack of the oven, close to the heating element. No need to do this on a gas stove.
Flip and bake for another 20-25 minutes until nicely roasted. You can switch to the broiler function to give it extra colour if necessary.
Let the food stand for 10 minutes.
Serve and enjoy!