Preheat oven to 230 degrees C (450 degrees F). In medium saucepan, combine shortening, salt and boiling water and heat until entire mixture boils. Reduce heat, add flour all at once and stir vigorously until mixture forms a ball. Remove from heat and add eggs, one at a time, beating thoroughly after each addition. Continue beating until mixture is thick and shiny and breaks from spoon.
Pipe or spoon onto ungreased cookie sheet and bake 20 minutes, reduce heat to 175 degrees C (350 degrees F) and bake 20 minutes more, or until golden and sound hollow when tapped. Cool and fill.