Peel onions and cut them into thin slices. Bring vinegar and 1/8 litre water to the boil. Add onion slices and let them simmer at low heat for about 5 minutes. Clean the rocket, wash thoroughly and drain well.
Halve the avocado, remove the stone, peel the halves, cut them into thin slices and sprinkle with 4 tablespoons of lemon juice. Wash the chives and cut into fine rolls. Mix soy cream, remaining lemon juice and half of the chive rolls, season with salt and pepper.
Arrange rocket, drained onion and avocado slices on 4 plates. Spread the soy dip on the plates and sprinkle with the remaining chives. Wholemeal bread tastes good with it.