Clean and wash the cauliflower. Do not remove the stalk completely. Cover with boiling salted water and cook for about 15 minutes. Clean and wash the rest of the vegetables. Cut spring onions into pieces and quarter mushrooms.
Fry both in a tablespoon of hot fat for three minutes while turning. Dust with flour and curry. Deglaze with 1/2 litre cauliflower stock and bring to the boil while stirring. Season to taste with salt, crushed chilli and lemon juice.
Refine with crème fraîche. Drain the cabbage and carefully cut it into slices one centimetre thick. Finely grate the toast and whisk the egg. Turn cabbage slices one after the other in egg and toast.
Fry in the remaining hot fat from both sides until golden brown and serve garnished with parsley.