Most Amazing Challah
Ingredients:
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4 (.25 ounce) packages quick-rise yeast
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4 cups warm water (110 degrees F/45 degrees C)
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2 tablespoons salt
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¾ cup white sugar
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1 cup pareve margarine, melted
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4 eggs
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12 cups bread flour, or as needed
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1 egg
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½ teaspoon vanilla extract
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¼ cup sesame seeds, divided