Preheat the oven to 180C/350F. Line a baking tray with parchment paper and set aside.
In a large mixing bowl, combine your flour and Greek yogurt and mix well, until fully combined and a ball of dough remains.
Lightly grease a kitchen surface with extra flour. Place the ball of dough on top, and top with a little extra flour.
Gently kneed the dough on both sides, flattening it out into a circular shape. Slice into 4 even pieces.
Use your hands to roll the dough into a thin, sausage shape. Join both ends of the dough to form a bagel shape. Place on the lined tray and repeat until 4 bagels are formed. Lightly brush the tops of each bagel with either butter, egg, milk or water. Sprinkle the seeds on top.
Bake the bagels for 20-22 minutes, or until golden brown. Remove from the oven and allow to cool completely.
* You can use either butter (dairy free), egg yolk, egg white, milk or even water. One of these MUST be used, otherewise, the seeds will fall off.