Preheat and Prep: Preheat the oven to 375°F. Line a baking sheet with parchment paper and sprinkle sesame seeds where the bagels will be placed.
Mix Dry Ingredients: In a bowl, break up any clumps and whisk together the quinoa flour, protein powder, ground flaxseed, date sugar, baking powder, baking soda, salt, and sesame seeds.
Prepare Wet Mixture: In a separate bowl, combine the water, apple cider vinegar, and psyllium husk. Let the mixture sit for 5 minutes to thicken.
Form the Dough: Add the wet ingredients to the dry ingredients and mix thoroughly. Adjust with a little extra water if necessary. Divide the dough into 3 equal portions and roll each portion into a ball.
Shape the Bagels: Place each dough ball onto the sesame-seeded surface, create a hole in the center, and shape into a bagel. Top generously with extra sesame seeds.
Bake: Bake for 25–30 minutes until golden brown. Let cool for 10 minutes before slicing and serving.