Frittata of leeks and ham from A Table in the Tarn: Living, Eating and Cooking in South-west France

Ingredients

• 1 tbsp butter
• 250 g new potatoes, scrubbed, dried and thinly sliced lengthwise
• 3 tbsp olive oil
• 100 ml cream
• 8 eggs
• 2 slices ham, cut into thin strips
• 1 leek, cleaned and thinly sliced
• 2 tsp mustard
• 1 tsp salt
• 125 g grated cheese, plus extra for sprinkling
• 1 tbsp flour
• splash of Tabasco
• freshly chopped thyme, rosemary, chives or parsley, plus extra for garnishing