Ingredients: 400 g bread flour 100 g whole wheat flour 375 g water 100 g active sourdough starter (100% hydration) 50 g flaxseeds (soaked) 10 g salt Instructions: Soak flaxseeds in hot water for 2–4h (or overnight). Mix flour + 350 g water. Rest 45 min (autolyse). Add starter, salt + 25 g water. Mix well. Fold in soaked flaxseeds. Bulk ferment 4–5h with stretch & folds (3–4 sets). Pre-shape, rest 30 min. Final shape, proof 1–2h or overnight in fridge. Bake in Dutch oven: 20 min...