Ham and Cheese Puffs

1 cup water
1/3 cup butter
1 cup all-purpose flour
5 eggs
1½ cups old cheese, shredded
1 cup ham, finely chopped
¼ tsp dry mustard

In heavy saucepan, combine water and butter; bring to boil. Remove from heat and add flour all at once, beating vigorously with wooden spoon until blended. Return to medium-high heat and beat until mixture leaves sides of pan and forms ball. Remove from heat and beat in eggs, one at a time, until mixture is smooth. Stir in cheese, ham and mustard. Drop by teaspoonful onto buttered baking sheets. Bake at 400F for 15-20 minutes or until golden brown and crusty. Yield: about 50. Freezes well.