Clean and wash the cabbage and cut out the stalk. Cut white cabbage into strips. Knead with salt. Peel, wash and roughly grate the carrot. Drain tuna and pluck into small pieces.
Add oil and vinegar to the cabbage and mix. Season to taste with salt and pepper. Wash parsley, shake dry and chop finely, except for a little to garnish. Add carrot, tuna, chilli rings and parsley to the cabbage.
Spread the baguette with herb butter and roast in a pan. Arrange the salad in a bowl. Garnish with parsley and 1 chilli pepper.