01 - Heat the oven to 375°F (190°C).
02 - Combine flour and salt in a bowl. Add cold cubed butter and rub with fingertips until mixture resembles coarse crumbs. Stir in cold water until dough forms.
03 - Roll dough on a lightly floured surface to 1/8-inch thickness. Cut rounds approximately 3 inches in diameter to fit mini tartlet pans. Press dough gently into pans, trim excess, and prick bottoms with a fork.
04 - Bake shells for 10 minutes, then remove from oven.
05 - Whisk eggs and sugar together until smooth. Add lemon zest, lemon juice, heavy cream, and melted butter; mix thoroughly.
06 - Pour lemon filling into pre-baked shells. Return to oven and bake for 12 to 15 minutes until filling is just set with a slight wobble in the center.
07 - Allow tarts to cool to room temperature. Remove from pans and garnish with lemon zest and fresh herbs as desired. Serve chilled or at room temperature.