Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a medium saucepan over medium heat, combine water, butter, sugar, and salt. Bring to a boil.

Remove from heat, add flour all at once, stirring vigorously until a smooth dough forms.

Let dough cool 5 minutes, then beat in eggs one at a time until incorporated.

Pipe or spoon dough onto baking sheet in 2-inch mounds.

Bake 20–25 minutes until golden and puffed. Let cool on wire rack.

Whip cream, powdered sugar, vanilla, lemon zest, and lemon juice until soft peaks form. Chill briefly.

Slice puffs in half, fill with lemon cream, top, and dust with powdered sugar.