01 - Whisk sourdough starter with warm water in a large bowl until completely dissolved and homogeneous.
02 - Add bread flour, sugar, salt, honey, chopped pistachios, and freeze-dried raspberries to the starter mixture. Stir until a shaggy, sticky dough forms.
03 - Turn dough onto lightly floured surface and knead vigorously for 8 to 10 minutes until smooth, elastic, and no longer sticky.
04 - Place dough in lightly oiled bowl, cover with plastic wrap or damp towel, and ferment at room temperature for 8 to 12 hours or overnight until doubled in volume.
05 - Turn fermented dough onto flour-dusted surface, divide into 8 equal portions, and shape each into a smooth ball. Poke thumb through center of each ball and gently stretch to form 2-inch holes. Transfer to parchment-lined baking sheet.
06 - Cover shaped bagels with towel and rest at room temperature for 45 to 60 minutes until slightly puffed and dough springs back slowly when touched.
07 - Preheat oven to 425°F. Bring poaching liquid (water, baking soda, honey) to a gentle simmer in a large, wide pot.
08 - Working in batches, carefully drop bagels into simmering water. Poach for 45 seconds per side (1.5 minutes total). Remove with slotted spoon, drain briefly, and return to prepared baking sheet.
09 - Immediately sprinkle wet bagels with chopped pistachios and freeze-dried raspberry pieces, pressing gently to adhere.
10 - Bake for 20 to 22 minutes until deep golden brown and crusty. Cool completely on wire rack before slicing and serving.