Lemon Prawn Sauce - cooking recipe

Ingredients

1 onion, chopped
1 bay leaf
1 grated lemon, rind of
50 g butter
40 g flour
140 ml fish stock
420 ml milk
350 g prawns, peeled and cooked
salt and pepper
225 g button mushrooms
1 tablespoon fresh tarragon, chopped
2 tablespoons parsley, chopped

Preparation

In the butter, fry the onion, bay leaf and lemon rind for about 10 minute.
stir in the flour, then pour in the stock and milk.
boil, stirring, and cook for 3 minute.
take off the heat and season to taste.
stir in prawns.
TO SERVE.
gently cook the mushrooms, add herbs and add to the prawn sauce.