Ten minutes before the end of rising time, preheat oven to 375°F. In a large 4-quart saucepan, bring boiling mixture to a rolling boil. Carefully place bagel onto a wide, slotted spatula, flip bagel top -side down first into the water. Repeat with a second bagel. Boil bagels 1 minute; flip bagels and boil an additional minute. Remove bagels to several layers of paper towels. Boil remaining bagels.