Clean the leek, cut in half and cut into fine strips. Then place in a sieve and rinse with water.
Put the pineapple in a sieve and cut the pieces in half again if necessary. Put the collected juice aside for now. Peel and core the apples and cut into cubes. Put everything together in a bowl and drizzle with the juice of half a lemon.
Prepare a smooth dressing from the remaining ingredients and about half of the pineapple juice. Season to taste, pour over the salad and fold in.
Let it steep for about 3 hours. - It tastes best if it is made the day before, as the leek will then be a little softer from the marinating process.