Put the Oven onto a high heat. About 200º and allow to heat up

Cut 4 whole slices of the celeriac about 7mm thick and trim the edges off. Cut 4 slices of pineapple also about 7mm thick, trim the outer skin off and take out the core. Place the pineapple on top of the celeriac add a little olive oil, salt and place in the oven one hot.

Prepare the slaw. Wash the red cabbage and slice into pieces that will fit into your food processor. Slice thinly and add to a bowl. Mix a dessert spoonful of Dijon mustard into the bowl. You may want to add a little extra oil and salt to taste. Put some cling film over the bowl and leave to the side.

After the Celeriac and pineapple has been in the oven for about 20 minutes, wash and trim the cavolo nero leaves and cut them in half so you end up with shorter pieces. You'll need about 4-5 halves per bun. Place them in a pan of boiling water and simmer until soft. They may take 7-8 minutes.

Cut the buns in half and place somewhere to warm. Keep your eye on them. You don't want them to burn.

Place a bain marie (Pyrex bowl) over the top of the pan with the cavolo nero in it. Empty the peanut butter into the bowl and warm gently while adding warm water gradually to thin into a sauce. Add enough water to make the sauce the gloopy kind of consistency that you want and stir thoroughly with a spoon.

After 30 minutes, check that your pineapple and celeriac is cooked all the way through and a little brown at the edges. Drain your cavolo nero and allow it to dry properly (you don't want a soggy bun).