1 c  Water
1/2 c  Butter/margarine
1/2 ts Salt
1 c  Flour, all-purpose
5 md Eggs
2 tb Butter/margarine
2 md Onions; minced
1 lb Mushrooms; minced
1 tb Sour cream

Preheat oven to 400F. Grease and lightly flour large baking sheet.
Combine water, 1/2 cup margarine and salt in saucepan. Bring to boil over
medium heat. Add flour all at once. Stir vigorously with wooden spoon until
smooth and dough forms a ball and leaves side of pan. Remove from heat.
Add eggs, 1 at a time, stirring until smooth after each addition. Spoon
dough into large pastry bag fitted with fluted nozzle. Pipe dollops of
dough, about 1 tablespoon each, onto prepared baking sheet, leaving room
for spreading. Bake 20-25 minutes until golden brown. Let cool.
Melt 2 tablespoons butter/margarine in a large skillet. Add onions and
mushrooms; saute over medium-low heat until tender. Stir sour cream into
onion mixture; let cool.
Cut baked pastry swirls in 1/2 horizontally. Using a spoon or small
paring knife, remove any soft dough inside puffs, leaving a hollow, 2 part
shell or crust about 1/4 to 3/8 inch thick. Spoon about 1 tablespoon sour
cream mixture in bottom portion of each swirl. Replace top portion of
swirls. Preheat oven to 350F. Bake on large baking sheet 10 minutes or
until heated through.