Preheat oven 180˚C
Slice the artichokes on a mandolin fairly thin, you need big slices as they shrink. Toss them in oil and season. Lay the slices on a baking tray and roast for 10-15 minutes until golden brown and crisp, but check them frequently as they burn very quickly.
Pull the Black Forest Ham into strips and twirl. Top the artichoke crisps with ½ teaspoon of crème fraiche, Black Forest ham and ½ teaspoon red onion marmalade, finish off with a sprinkling of cress or chives.