Most Amazing Challah

Details

Ingredients

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