Step 1 Peel the potatoes and cut them into 2cm cubes. Melt the duck fat in a non stick pan.
Step 2 Add the potatoes and season with salt and pepper. Sauté until golden brown over a low to medium heat, around 25 minutes, stirring from time to time to avoid sticking. For the last few minutes add the garlic.
Step 3 Once the potatoes are cooked, remove them from the heat and crush them with a fork. Add the cheese, stirring constantly until you get a mixture in which the potatoes are no longer distinguishable from the melted cheese.
Step 4 Serve immediately with one of the suggested accompaniments above and a salad or veg.