In a heavy saucepan, combine the water, salt, sugar and butter, and bring to a boil.
3.
Add the flour all at once, whisking constantly, until it forms a thick paste. Cook, stirring, for one minute more.
4.
Remove from the heat and transfer to a mixing bowl. Using an electric mixer, whisk in the eggs one at a time until completely incorporated. Stir in the cheese and mustard.
5.
While the dough is still warm, scoop or pipe onto parchment-lined sheet trays. Bake until very brown and crisp, 20 to 25 minutes. Serve warm.
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By
Jennifer
