01 - Dissolve sourdough starter in warm water within a large mixing bowl, stirring until fully incorporated and smooth.
02 - Add bread flour, sugar, salt, honey, pistachios, and freeze-dried raspberries to starter mixture. Mix until shaggy dough forms.
03 - Knead dough on lightly floured surface for 8–10 minutes until smooth and elastic with proper gluten development.
04 - Place dough in lightly oiled bowl, cover, and ferment at room temperature for 8–12 hours or overnight until doubled in size.
05 - Divide dough into 8 equal pieces on flour-dusted surface. Shape each into smooth balls.
06 - Poke hole through center of each ball and gently stretch into bagel shape. Place on parchment-lined tray, cover, and rest 45–60 minutes until puffed.
07 - Preheat oven to 425°F. Bring poaching liquid to simmer in large pot.
08 - Drop bagels into simmering water in batches. Poach 45 seconds per side. Remove with slotted spoon and return to tray.
09 - Sprinkle bagels with additional chopped pistachios and freeze-dried raspberry pieces if desired.
10 - Bake for 20–22 minutes until deep golden brown. Cool completely on wire racks before serving.