Challah

Ingredients

• 2 tablespoons active-dry yeast
• 1/2 cup warm water (110 to 115 degrees)
• 6 tablespoons plus 4 teaspoons sugar
• 2/3 cup boiling water
• 6 tablespoons unsalted margarine, plus more for bowl and pans
• 2 tablespoons soy oil
• 2 teaspoons salt
• 3 tablespoons buckwheat honey
• 4 large eggs, room temperature
• 6 cups all-purpose flour
• 2/3 cup wheat germ
• 1 large egg yolk
• 1 cup currants
• 1 large egg, lightly beaten
• 1 1/2 teaspoons ground cinnamon
• 1/2 cup plus 1 tablespoon sugar
• 1 large egg white