Preheat oven to 375 degrees F. Line a baking sheet with parchment paper and spray with olive oil.
Add the flour, baking powder, yogurt, and salt (if using) to a large bowl. Stir together with a fork to make a crumbly dough. Then, knead lightly with your hand to bring it fully together.
Divide the dough into 4 equal portions. Form into balls. Roll into a tube about 8 inches long, and form a circle. Place onto the prepared baking pan.
(The dough may be a little sticky, so expect that. You can add a little more flour as needed, or you can coat your fingers and/or the bagels with a little flour as you work. You can also wash your hands halfway through which will help, too.)
Optional: Brush with egg and sprinkle with seasoning.
Bake for 24-26 minutes, or until lightly golden brown. Remove from oven and let cool on a wire rack.
