For the crespelle, mix flour, milk and eggs to a smooth dough. Season with salt and pepper. Let the dough swell for about 20 minutes.
In the meantime clean and wash the pointed cabbage and remove the leaves. Blanch in boiling salted water for about 2 minutes, drain and rinse under cold water. Cut thick leaf ribs flat.
Roast the nuts in a pan without fat, remove. Let it cool down a little and chop finely. Wash the thyme, shake dry and remove the leaves from the stalks. Mix ricotta, thyme and nuts.
Season to taste with salt and pepper.
Heat the clarified butter in portions in a large coated pan (approx. 28 cm Ø). Bake 4 golden brown pancakes from the dough.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Grease an ovenproof dish. Spread the pancakes evenly with ricotta. Cover each pancake with 2-3 pointed cabbage leaves and roll up firmly.
Cut the rolls diagonally into thick slices (not higher than the mould!). Place the slices in the casserole dish with the cut surface facing downwards and close together.
Mix cream and Ajvar. Season to taste with salt and pepper. Pour over the crespelle. Bake in a hot oven for 15-20 minutes.