Scallops and chestnut butter

Ingredients, to feed two.
For the scallops:
1 tsp olive oil
shallot, peeled, finely sliced
75g/2½oz butter, softened
½ lemon, zest only
1 tbsp finely chopped fresh chervil
1 tbsp finely chopped fresh chives
45g/1½oz chestnuts, finely chopped
salt and freshly ground black pepper
scallops, cleaned
For the salad
½ tbsp wholegrain mustard
½ tbsp good quality white wine vinegar
1½ tbsp good quality sunflower oil
Watercress, wild rocket, and spinach, plus any Chickweed and Bittercress available.
Preparation method
For the scallops, heat a frying pan until warm, add the olive oil and shallot and fry gently until softened but not coloured.
Place the butter into a bowl and add the cooked shallot, along with all the remaining scallop ingredients, except the scallops.  Season, to taste, with salt and freshly ground black pepper and mix well.
Preheat the grill to high.
Place the scallops onto a grill tray and top each scallop with a spoonful of the chestnut butter.  Place under the grill for 3-4 minutes, or until just cooked through.  Remove from the grill and set aside to rest for a minute or two.
For the salad, whisk the mustard, vinegar and oil together in a bowl.  Place the leaves into a bowl, drizzle over the dressing and stir to coat.
To serve, place three scallops onto each of 2 serving plates and serve with a pile of salad.