Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper or a silicone mat. If using parchment paper, lightly spray with oil to prevent sticking.

In a medium bowl, whisk together the flour, baking powder, and salt. Add the Greek yogurt and mix with a fork or spatula until well combined, forming crumbles.

Lightly dust a work surface with flour. Remove the dough from the bowl and knead a few times until it's tacky but not sticky (about 15 turns). The dough should not stick to your hands when you pull away.

Divide the dough into 4 equal portions. Roll each portion into a 3/4-inch thick rope and join the ends to form a bagel shape. Alternatively, form a ball and poke a hole in the center, then gently stretch it to form a bagel.

Brush the bagels with the beaten egg white and sprinkle with your desired toppings on both sides. Place on the prepared baking sheet. Bake on the top rack of the oven for 25 minutes, or until golden brown. Let cool for at least 15 minutes before cutting.

In a medium bowl, whisk together the flour, baking powder, and salt. Add the Greek yogurt and mix with a fork or spatula until well combined, forming crumbles.

Lightly dust a work surface with flour. Remove the dough from the bowl and knead a few times until it's tacky but not sticky (about 20 turns). The dough should not stick to your hands when you pull away.

Divide the dough into 4 equal portions. Roll each portion into a 3/4-inch thick rope and join the ends to form a bagel shape.

Brush the bagels with the beaten egg white and sprinkle with your desired toppings on both sides.

Preheat your air fryer to 280°F (140°C). Carefully transfer the bagels to the air fryer basket in a single layer, avoiding overcrowding. Bake for 15 to 16 minutes, or until golden brown. They do not need to be turned. Let cool for at least 15 minutes before cutting.