Blitz the broccoli in a food processor or chop very finely by hand. Heat the oil in a frying pan, stir fry the broccoli and hazelnuts for approx. 3 mins., transfer to a bowl.
Add the cranberries and feta to the broccoli, mix.
Combine the vinegar and oil, season, drizzle over the salad. Mix the salad, serve in bowls.