Mashed potato

Name: Mashed potato
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Yield: 4 servings
Cuisine: Global
Ingredients: 1 kg of Charlotte potato; 1 pinch of Fine sea salt; 50 gr of Parmigiano cheese; 250 ml of Semi skimmed milk; 40 gr of Unsalted butter