Potato gratin with ham

Ingredients for 4 to 6 people
1 kg firm potatoes (Charlotte, Nicola, etc.), cut into 3 to 5 mm slices
200 to 250 g cooked or smoked ham, cut into pieces or strips
1 onion, finely chopped (optional)
1 clove of garlic, chopped (optional)
40 g unsalted butter
40 g wheat flour
500 ml whole milk
100 g whipping cream or garlic flavor
Fine salt, freshly ground pepper, grated nutmeg
100 to 150 g grated cheese (Gruyère, Comté, Emmentaler or Cheddar)

Preparation

the Preparation on the next page