Peel the potatoes and clean the broccoli. Boil the potatoes, mash them and mix them with the butter, milk, then add the salt and black pepper to taste.
Put the broccoli to boil but let it remain hard. In a plate, first put the mashed potatoes, the broccoli on top and sprinkle with a mixture of cheese and cream (prepared beforehand).
Bake in a preheated 356°F (180 °C) oven for about 15-20 min., then sprinkle with cheese and bake another 10 min.