Preheat oven to 375°F. Line a baking sheet with parchment paper or lightly grease the surface.
Whisk together the flour, baking powder, and salt in a medium bowl until evenly combined.
Add Greek yogurt and mix with a spatula or hands until a shaggy dough forms. Adjust consistency with additional flour or yogurt as needed.
Transfer dough to a lightly floured surface. Knead gently, divide into 4 equal pieces, roll each into a 6-inch rope, and shape into rings by pinching ends together to seal.
Arrange bagels on the prepared tray. Brush tops with beaten egg and sprinkle with your choice of toppings.
Bake for 20 to 25 minutes until golden brown and puffed. Cool for at least 10 minutes before slicing and serving.
Notes
For a sweeter version, consider using cinnamon sugar as a topping.
Experiment with different toppings to suit your taste.
Can be stored in an airtight container for a few days.