In a large mixing bowl, whisk together the high-protein flour, baking powder, and salt until well blended.

Add the Greek yogurt to the dry ingredients. Stir with a spoon or your hands until a shaggy dough forms. If the dough is too sticky, add a little more flour as needed.

Transfer the dough to a lightly floured surface and knead for about 5 minutes until smooth and elastic.

Divide the dough into 6 equal pieces. Roll each piece into a ball, then use your finger to poke a hole through the center to form a bagel shape. Gently stretch the hole to ensure it is wide enough.

Preheat your oven to 375°F (190°C).

Bring a large pot of water to a boil. Carefully drop the bagels into the boiling water, cooking for about 1 minute on each side. Remove with a slotted spoon and place on a baking sheet lined with parchment paper.

Beat the egg and brush it over the top of each bagel. Sprinkle with your choice of toppings if desired.

Place the baking sheet in the preheated oven and bake for 20-25 minutes or until the bagels are golden brown.

Remove from the oven and let the bagels cool on a wire rack before serving.