1/2 cup water 1/2 cup milk 1 stick (4 ounces) unsalted butter, cut into tablespoons Large pinch of coarse salt 1 cup all-purpose flour 4 large eggs 3 1/2 ounces shredded Gruyère cheese (1cup), plus more for sprinkling Freshly ground black pepper Freshly grated nutmeg Directions Gather the ingredients. Preheat the oven to 400°F. Line two baking sheets with parchment paper. In a medium saucepan, combine the water, milk, butter, and salt; bring to a boil. Add the flour and stir