Pre-heat the oven to 180C

Place the garlic bulb in foil with half the oil, wrap well and put in the oven at 180C for around 30-45 minutes.

Remove the garlic from the oven and leave to cool, before removing the foil. Chop the top off the bulb and squeeze the roasted garlic into a bowl.

Add the mayonnaise to the garlic in the bowl and mix together until smooth.

Peel the sweet potatoes and cut into small chunks. Place on a lined baking sheet, toss in the remaining oil and cook in the oven for 15 minutes.

Cut the potatoes into small chunks and boil separately until tender. Add to the tray of sweet potatoes, stir and return to the oven.

Once the potatoes are lightly coloured, remove from the oven and leave to cool.

Finely chop the red cabbage and stir fry it for a few about 4 mins to soften it.

Put all the ingredients into the bowl with the mayonnaise, walnuts and sultanas. Mix well and season to taste before serving.