c("Mince the chicken, mix in the tarragon, lemon zest and pepper.", "Beat in the egg  white, form the mixture into small balls using your hands.", "Place the butter,  flour, milk and crumbled stock cube in a saucepan, heat stirring until soup  boils, thickens and is smooth.", "Add pepper to taste. Drop in the chicken balls  and boil for 4-5 minutes.", "Just before serving add watercress leaves to the  soup.", "Serve hot with brown bread.")