Heat oven to 400°.
Heat water and butter until mixture boils vigorously.
Stir in flour.
Beat over low heat until mixture forms a ball, about 1 minute.
Remove from heat.
Beat in eggs; beat until smooth.
Drop dough by slightly rounded teaspoonfuls onto ungreased baking sheet.
Bake 25 to 30 minutes.
Cut puffs in half; cool.
Place puffs on 2 pieces heavy duty aluminum foil.
Wrap, label and freeze.
10 minutes before serving, heat oven to 400°.
Have ready: ingredients for Escargots.
Remove 1 package Puff Shells from freezer and open foil wrapper; place on ungreased baking sheet.
Heat in oven until warm, about 5 minutes.
Prepare Escargots.
Guests spoon escargots and butter sauce into half of puff shell and top with other half.