Onion pie

Dough

• 1¼ cups butter
• 1 cup all-purpose flour
• 1 pinch salt
• ⅔ cup margarine, 2/3 cup
• 3 egg yolks

Filling

• 3 tablespoons margarine
• 3 onions, large, sliced
• 4 eggs, whole
• 1½ cups milk
• 1 tablespoon cornstarch
• ½ cup parsley, chopped
• parmesan, grated

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