INGREDIENTS
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Step 1: Making and Rolling the Dough
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10 tbsp cold, unsalted butter
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5 tbsp ice cold water
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1 2/3 cups all-purpose flour
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1 pinch table salt
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Preparing the Onions & Pre-Baking Tart
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7 cups onions
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1/4 cup vegetable oil
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2 pinches table salt
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2 tbsp all-purpose flour
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1/2 cup milk
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1/2 tsp table salt
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1/8 tsp white pepper