Wash and halve the leek, then cut into semicircular strips. Also cut the onions into strips and set aside.
Mix together the cream cheese, eggs, about 100 g of the grated cheese, nutmeg and pepper.
Fry the leek and onions until translucent. Then add the bacon cubes and continue frying. When everything is done, pour into a suitable tart form and pour the egg and cheese mixture over it. Scatter the rest of the cheese on top.
The leek tart is in the oven at 180 ° C for 30 - 35 minutes.