Wash the leeks. Cut the whites, and half them lengthwise. Then slice into thin slices. Also slice the greens into thin strips.
Steam the leeks for 20 minutes.
Fry the bacon bits in a frying pan.
Cut the mushrooms into slices and fry them for a few minutes in olive oil.
In a bowl, beat the eggs and add the cream.
Mix in the cream. Add nutmeg, chilli pepper, pepper and a little salt.
Incorporate the bacon bits and chopped parsley leaves.
Place your pastry in a pie dish. Pour the cooked leeks and the mushrooms.
Pour over the egg/cream/ bacon mixture.
Coarsely crush the hazelnuts. Sprinkle the top of the tart with the hazelnut chips and cheese shavings.
Bake the tart for 30 minutes at 180°C.