Beat the Cream until stiff peaks form – fold in the Lemon Curd and Lemon Juice (if using) – chill for 10 minutes before use
Gently open up a small piece in the center of one of the sides of each baked pastry square, lifting the upper part carefully (only enough for the nozzle to fit through)
Pipe the Lemon Cream into the pastry opening (about 1 – 1 1/2 tablespoonfuls per pastry)