01 - Preheat oven to 375°F. Lightly grease a mini muffin tin or tartlet pans with cooking spray or butter.
02 - Unroll the puff pastry and cut out 12 circles using a 2.5-inch round cutter or biscuit cutter. Press each circle gently into the prepared tin, forming small cups.
03 - Brush the pastry shells thoroughly with beaten egg using a pastry brush. Prick the bottoms with a fork to prevent puffing during baking.
04 - Bake for 12 to 14 minutes until golden brown and crisp. Remove from oven and let cool completely in the tin before removing.
05 - In a mixing bowl, combine cream cheese, heavy cream, lemon juice, lemon zest, powdered sugar, and salt. Beat with hand mixer or whisk until smooth and creamy, about 2 minutes.
06 - Spoon or pipe the lemon cream filling into the cooled tartlet shells, filling each to just below the rim.
07 - Top each tartlet with chopped chives, microgreens or dill, and lemon zest curls if using. Serve chilled or at room temperature.