For the relish, cut tomatoes into fine strips. Wash parsley, shake dry, pluck leaves from the stalks and chop finely. Wash lemon hot, grate dry and peel in thin strips with a zest ripper. Halve the fruit and squeeze the juice. Chop the zests. Mix tomatoes, parsley, olives, 4 tbsp. lemon juice, lemon zests and 4 tbsp. olive oil. Season to taste with salt and pepper.
Clean, wash and drain the cabbage. Cut into 6 approx. 2 cm thick slices. For the sauce peel, wash and chop the potatoes. Peel and finely dice the onion. Bring the stock, diced onion and potatoes to the boil and cook for about 15 minutes
Heat 2 tablespoons of oil in 2 pans. Fry cabbage slices for about 15 minutes while turning. Season with salt and some nutmeg. Mash potatoes finely in the broth. Grate cheese. Divide about 100 g of the remaining cauliflower into fine florets. Add crème fraîche, parmesan and cauliflower to the potatoes. Season the sauce with salt and pepper
Arrange cauliflower slices, sauce and relish on plates