Wash watercress, shake dry, pluck leaves from the stems and, except for something to garnish, chop in the universal chopper. Add butter and lemon juice and mix to a smooth mixture. Season to taste with salt and pepper
Place the ready butter on a piece of cling film and form into a roll (4 cm Ø). Chill for approx. 1 hour
Serve the spread with warm bread. Garnish with watercress
Waiting time approx. 1 hour