3 To make the pesto; process all the ingredients, add salt to taste.
4 Have the scallops at room temperature. Heat the butter and olive oil together in a fry pan. When hot, add the scallops and cook until well seared and golden on one side, turn and repeat - this will only take 2 minutes per side.
5 Use a sharp knife to cut out squares of artichoke. Top with a small amount of watercress pesto, then a scallop. Garnish with a watercress sprig and a drizzle of oil.