In a bowl, combine the flour, Greek yogurt, salt, and baking powder. Mix until a soft, slightly sticky dough forms.
Shape the dough into a ball and divide it into 4 equal pieces. Press your thumb through the center to form a classic bagel shape, and shape it.
Beat the egg and brush it over the top of each bagel. This gives them a beautiful golden finish.
Sprinkle your favorite toppings generously over the egg-washed bagels.
Bake the bagels at 400°F (200°C) for 25 minutes, or until golden brown.
Let the bagels cool slightly before enjoying warm, fresh, and fluffy homemade bagels!