Green beans with hazelnuts and bacon servings = 4 as a side dish

Name: Green beans with hazelnuts and bacon servings = 4 as a side dish
Cuisine: British, European
Ingredients: 500g green or runner beans, trimmed and sliced; 4 rashers of smoked streaky bacon, chopped into pieces; handful of hazelnuts, toasted (peeled if you like) and roughly crushed; 2T cider vinegar; 5 T crème fraiche (or thick cream), more if serving with pasta; handful of tarragon or parsley, chopped