Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.
In a medium-sized saucepan, combine water, butter, and salt. Bring the mixture to a boil over medium heat.
Once the mixture is boiling, reduce the heat to low and add the flour all at once. Stir vigorously with a wooden spoon until the mixture forms a smooth ball.
Remove the saucepan from heat and let the dough cool for a few minutes.
Add the eggs, one at a time, beating well after each addition. The dough should be smooth and shiny.
Transfer the dough to a piping bag fitted with a large round tip.
Pipe the dough onto the prepared baking sheet, forming a ring shape. You can use a circular template to guide you if desired.
Bake the choux pastry for 20-25 minutes, or until golden brown and puffed.
Once baked, remove the pastry from the oven and let it cool completely before filling.