Start by preheating your oven to 375°F (190°C) and lining a baking sheet with parchment paper. This prevents sticking and ensures even baking. Preparing the baking tray first also saves time once the dough is ready.
In a large mixing bowl, combine the gluten-free flour, baking powder, and salt. Stir them well so the baking powder distributes evenly throughout the flour. This step is important because it helps the bagels rise properly in the oven.
Add the Greek yogurt to the bowl with the dry ingredients. Stir everything together until the mixture begins forming small crumbles. At this stage, it won’t look like smooth dough yet, but that’s completely normal.
Lightly dust a clean surface with flour and transfer the crumbly mixture onto it. Knead the dough gently until it becomes slightly tacky but not sticky. Avoid over-kneading because that can make the bagels dense.
Divide the dough into four equal portions and roll each piece into a ball. Roll each ball into a rope about 3–4 inches long, then connect the ends to create a bagel shape with a hole in the center.
Whisk the egg white in a small bowl and brush it over the surface of each bagel. This helps the tops turn golden brown while baking. Sprinkle everything bagel seasoning or your preferred topping on top.
Place the bagels on the prepared baking sheet and bake them for 25–28 minutes until lightly browned around the edges. Once baked, remove them from the oven and let them cool slightly before serving.