Ingredients
1-1/4 cups water1/4 cup butter, cubed1/2 teaspoon salt1 cup all-purpose flour4 large eggs, room temperature1 cup shredded Swiss cheeseFILLING:2 cups finely chopped cooked chicken1 cup shredded Swiss cheese3/4 cup chopped celery1/2 cup mayonnaise1/2 teaspoon salt1/2 teaspoon prepared yellow mustard1/8 teaspoon pepperMinced chives, optional
Preparation
In a large saucepan, bring the water, butter and salt to a boil. Add flour all at once and stir until a smooth ball forms. Remove from the heat; let stand for 5 minutes. Add eggs, 1 at a time, beating well after each addition. Continue beating until mixture is smooth and shiny. Stir in cheese.
Drop by tablespoonfuls 2 in. apart onto greased baking sheets. Bake at 400° until golden brown, 20-25 minutes. Remove to wire racks. Immediately split puffs open; remove tops and set aside. Discard the soft dough from inside the puffs. Cool puffs.
Meanwhile, in a large bowl, combine the first 7 filling ingredients. Spoon into puffs and, if desired, sprinkle with chives; replace tops. Serve immediately.