Inspiration from here and used method by Kristen from Full Proof Baking.
Characteristic of this bread: The texture is moist, chewy, slightly sticky with a hard crust and very mild tangy taste. Sticky is because of the soaked multigrain. Usually sourdough starter provides an aromatic flavour to the bread.
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Multigrain Open Crumb Sourdough Bread Recipe
Yields: 1 loaf
Total flour is 325g + 32.50g (from the levain) = 357.50g
245g bread flour (I used Japanese high gluten flour) - 75% 50g whole wheat flour - 15%
30g rye flour - 10% 250g water - 77% hydration 7g sea salt - 2.1%
65g sourdough starter (100% hydration) - 20%
Feed 22g sourdough starter + 22g bread flour + 22g water, keep at room temperature, wait until tripled, around 3 - 4 hours
Multigrain to sock:
55g multigrain (I used 9 grains) - 17%
61g boiling water
In a bowl, pour the boiling water over the multigrain, cover with cling film and soak overnight.
METHOD: Autolyse - Mix all flours and water, stir until there is no more dry flour with a spatula. Or use a stand mixer with paddle attachment for 2-3 minutes at low speed. Cover and leave for 1 to 2 hours. Levain and Soaked Multigrain- Wet your hand, add 65g levain into the dough, then add in soaked multigrain and hand mixing until incorporated, about 3 - 4 minutes. Or use a stand mixer with hook attachment and knead for 6 to 8 minutes until window pane stage. Cover and rest for 30 minutes. Sea Salt - Sprinkle sea salt on top of the dough, use hand to mix in the salt. It takes about 5 minutes until it is fully incorporated. Cover and rest for 30 minutes. Fold - Lightly mist the counter top with water. Wet your hand and scrapper. Transfer dough to the counter top. Pull and fold the four sides, flip over and round the dough. Return to the same bowl. Cover and rest for 30 minutes. Lamination - Lightly mist the counter top with water and wet your hand. Pull from centre out to form a rectangle shape. Pick up one edge and fold into the center. Pick up other edge and fold into the center over first section. Fold the top down half way. Fold the bottom up. Put dough in a new dish (square pyrex dish). Cover and rest for 30 minutes. Stretch and Fold 1 - Fold dough in the dish. Cover and rest for 30 minutes. Stretch and Fold 2 - Repeat the same. Cover and rest for 30 minutes Stretch and Fold 3 - Repeat the same. Cover and rest for 90 minutes. Shape - Flour the counter top. Shape and coat the dough with sesame seeds then transfer to a slightly flour banetton. Proof - Proof at room temperature (RT) for 15 - 20 minutes. Then retard overnight in the fridge for 12 - 16 hours. Preheat oven, with the dutch oven at 250C for 30 minutes before baking. Take bread dough out from the fridge, invert onto a parchment paper and scoring. Immediately transfer the dough with the parchment paper to your preheated dutch oven. Bake with cover on for 20 minutes. Remove the cover and lower the temperature to 230C, continue bake for another 20 minutes. Remove bread from oven and dutch oven. Let it cool on rack completely before slicing.