In a large bowl, whisk together flour, baking powder and salt.
Add Greek yogurt and blend just until lumpy dough forms. *Do not over mix the dough or this may result in flat bagels*
Divide dough into 8 equal parts.
Grab the first chunk of dough and roll it around using your hands, pressing it together to compact it. Then poke a hole in the center and gently squeeze the dough all the way around to enlarge the circle. The hole in the center should be about 2" wide.
Place the bagel-shaped dough onto a lined lightly floured baking pan. Repeat until all bagels are formed and placed onto the baking sheet, leaving space between each so they have room to expand. I put four bagels on each baking sheet.
In a small bowl or cup, beat the egg then brush it onto each bagel. Add your toppings.
Bake on the upper rack at 400˚ in preheated oven for 20 minutes or until lightly golden brown. Remove from oven and cool for about 5 minutes before cutting. Toast and add toppings as desired.