01 - Whisk together gluten-free flour blend, granulated sugar, instant yeast, and salt in a large mixing bowl until thoroughly combined.
02 - Pour warm water, vegetable oil, and apple cider vinegar into the dry ingredients. Stir vigorously until a sticky, cohesive dough forms.
03 - Gently fold blueberries into the dough using a spatula, taking care to avoid crushing the fruit.
04 - Lightly oil hands and shape dough into a ball. Cover bowl with clean towel and place in warm area for 45 minutes until dough becomes slightly puffy.
05 - Set oven to 425°F. Line baking sheet with parchment paper.
06 - Dust work surface with gluten-free flour. Divide dough into 8 equal portions. Roll each into a smooth ball, create hole in center, and stretch gently to form classic bagel shape. Arrange on prepared baking sheet.
07 - Bring 2 quarts water to gentle boil in large pot. Add honey or maple syrup if desired and stir to dissolve.
08 - Carefully lower 2-3 bagels into boiling water. Cook for 30 seconds on each side. Remove using slotted spoon and return to baking sheet. Repeat with remaining bagels.
09 - Brush each bagel with beaten egg wash and sprinkle coarse sugar over top surface.
10 - Place baking sheet in preheated oven and bake for 20-22 minutes until golden brown. Transfer to wire cooling rack and cool completely before serving.