01 - Whisk together gluten-free flour blend, sugar, yeast, and salt in a large mixing bowl until thoroughly combined.
02 - Pour warm water, vegetable oil, and apple cider vinegar into dry ingredients. Mix vigorously until sticky, cohesive dough forms.
03 - Gently fold blueberries into dough using light folding motion to avoid crushing fruit. Distribute berries evenly throughout.
04 - Shape dough into smooth ball with lightly oiled hands. Cover bowl with clean towel. Place in warm area for 45 minutes until 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 using bench scraper or knife.
07 - Roll each portion into smooth ball. Create hole in center using finger. Gently stretch and shape into classic bagel form. Transfer to prepared baking sheet.
08 - Bring 2 quarts water to gentle boil in large pot. Stir in honey or maple syrup until dissolved.
09 - Carefully lower 2-3 bagels into boiling water using slotted spoon. Boil 30 seconds per side. Transfer back to baking sheet. Repeat with remaining bagels.
10 - Brush each bagel with beaten egg wash using pastry brush. Sprinkle coarse sugar evenly over tops.
11 - Bake at 425°F for 20-22 minutes until deep golden brown. Cool on wire rack for at least 15 minutes before slicing.