3 garlic cloves, chopped
½ lemon, juice only
½ lemon, zest only
5 fresh parsley stalks
1 banana shallot, finely chopped
250g/9oz linguine, cooked according to packet instructions
salt and freshly ground black pepper
1 tbsp olive oil
10 peppercorns
1 tbsp tomato purée
50ml/2fl oz double cream
3 whole langoustines
4 langoustine, heads and shells only
50ml/2fl oz white wine