Mix the Dough: In a large mixing bowl, combine bread flour, sourdough starter, water, honey, matcha powder, and sea salt. Knead the dough by hand or using a stand mixer with the dough hook attachment until smooth and elastic, about 8-10 minutes.400g bread flour, 100g sourdough starter (100% hydration), 220g water, 15g honey, 10g matcha powder (ceremonial or culinary grade), 8g sea salt Rest the Dough: Cover the dough with a damp towel or plastic wrap and let it rest at room temperature for 6-8 hours, or until it doubles in size. During the first rise, gently stretch and fold the dough every 1-1.5 hours. This strengthens the dough and helps achieve the perfect chewy texture in your bagels.
Overnight Proof: After the first rise, place the covered dough in the fridge for an overnight proof to develop flavor.
Shape the Bagels: The next day, remove the dough from the fridge and divide it into 8 equal pieces. Roll each piece into a ball, then poke your finger through the center of each ball to form a hole. Gently stretch the hole to about 1.5-2 inches in diameter.
Final Rise: Place your bagels on a greased tray and let them rise 1-3 hours or until puffy to the touch.
Boil the Bagels: Preheat the oven to 425°F (220°C). Bring a large pot of water to a boil. Boil each bagel for 1 minute on each side. Remove with a slotted spoon and place them on a parchment-lined baking sheet.
Bake the Bagels: Bake the bagels in the preheated oven for 20-25 minutes, or until they are golden brown and firm to the touch. Allow them to cool on a wire rack before serving.