Peel and finely chop the garlic, do not press. Clean, wash and cut the leek into strips. Put the butter in a pan and fry the leeks and garlic for 2 minutes. Then add the dill, lemon juice and prawns. Mix the crème fraîche with the eggs, salt and pepper and fold in.
Preheat the oven to 200 degrees, then roll out the puff pastry and line any shape with it, forming a 3 cm high edge. When the batter is properly shaped, the shrimp and leek mixture can be poured in.
Bake the tart in the oven at 180 degrees for 35-40 minutes.