Clean, peel and wash the kohlrabi. Cut each kohlrabi into about 5 slices. Cover and cook in plenty of boiling salted water for about 5 minutes until al dente. Rinse briefly under cold water, drain and allow to cool.
Peel the onion and cut into fine slices. Wash, drain and halve the tomatoes. Halve avocado, remove core, peel flesh and cut into cubes. Mix with tomatoes, onions and about 2 tbsp. lime juice.
Season with salt and pepper.
Peel and finely chop the garlic. Mix yoghurt, garlic, 1 tablespoon lime juice and season with salt.
Put the cornflakes in a freezer bag and crush them finely with a pastry roll. Mix with breadcrumbs. Whisk eggs, 1 tablespoon cold water, some salt and pepper. Put the flour in a deep plate.
Heat the oil in portions in a large frying pan. Turn the kohlrabi slices first in flour, then in egg and finally in the cornflake mixture. Turn in the hot oil for 3-4 minutes, turning each portion until golden brown
Stack the kohlrabi schnitzel on plates to form turrets and serve with some avocado and tomato salad. Add yoghurt aioli.