Mix the 4 cups of flour, 3 cups non fat Greek yogurt, 1 tsp. of salt, and 2 tsp baking soda to make the dough.
Make an egg wash with 1 egg and 1 tsp cold water.
Top the bagels with either Cinnamon Toast Crunch topping or cinnamon sugar.
Bake in the oven at 350 for 30 minutes.
