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. Mix vigorously until a sticky, cohesive dough forms.
03 - Gently fold blueberries into the dough using a spatula, taking care to avoid crushing the berries and preserving their integrity.
04 - Lightly oil hands and shape dough into a smooth ball. Cover bowl with a clean towel and place in a warm, draft-free area for 45 minutes until dough becomes slightly puffy.
05 - Set oven to 425°F. Line a baking sheet with parchment paper and set aside.
06 - Dust work surface lightly with gluten-free flour. Divide risen dough into 8 equal portions using a bench scraper or knife.
07 - Roll each portion into a smooth ball. Create a hole in the center using your thumb and gently stretch outward to form traditional bagel shape, about 3 inches in diameter. Arrange on prepared baking sheet.
08 - Bring 2 quarts of water to a gentle boil in a large pot. Stir in honey or maple syrup if using, ensuring complete dissolution.
09 - Carefully lower 2-3 bagels into boiling water using a slotted spoon. Boil for 30 seconds, flip carefully, and boil for an additional 30 seconds. Remove and return to baking sheet. Repeat with remaining bagels.
10 - Brush each boiled bagel with beaten egg wash using a pastry brush. Sprinkle coarse sugar evenly over the tops for added crunch and sweetness.
11 - Place baking sheet in preheated oven and bake for 20-22 minutes until bagels achieve golden-brown color and sound hollow when tapped.
12 - Transfer baked bagels to a wire cooling rack. Allow to cool completely before slicing, toasting, and serving with cream cheese or desired spreads.