Source: Something Different for Passover by Frances AvRutick
Lemon Filling:
Mocha Filling:
Chocolate Glaze:
Lemon Filling: Combine sugar, potato starch and salt in a medium pan. gradually add ice water. Stir in egg yolks, lemon peel, and lemon juice. Cook and stir over medium heat until bubbly. Boil only one minute-no longer. Remove from heat and stir in butter. Let cool 15 to 20 minutes. Fills 8-10 large or 12-16 small puffs.
Mocha Filling: Melt chocolate (microwave on medium setting for 2 minutes or heat in double boiler). Whip cream with sugar and coffee until stiff. Fold in melted chocolate. Fills 8-10 large puffs or 12-16 small puffs.
Chocolate Glaze: Bring chocolate and water to a boil. Spread small amount immediately on each cream puff. Refrigerate to set.