Wash the kale thoroughly, drain well and cut out any thick leaf veins. Cut the cabbage into fine strips. Mix vinegar, salt, pepper and 1 pinch of sugar. Fold in 3 tablespoons of oil. Mix marinade and kale in a bowl and knead well with your hands.
For the dressing, cut 1 orange in half and squeeze it. Mix orange juice, tahini, yoghurt and mustard. Season with salt and pepper.
Peel the remaining oranges so that the white skin is completely removed. Cut oranges into slices. Cut avocados in half, remove seeds, remove the flesh and cut into slices. Mix kale, orange slices and avocado. Arrange on a plate and sprinkle with the dressing.
Arrange the mozzarella on the salad, either whole or chopped, and drizzle with a little oil. Cut cress from the bed and sprinkle on the salad. Sprinkle with coarse pepper to taste.
Tip: Kale is often available in 1 kg bags. The remaining 500 g taste good in stews, casseroles or smoothies. If you blanch the leaves for 2-3 minutes, it can also be easily frozen.