May 6, 2021.
10:35 am. Mix (by hand/spatula) to homogeneity: (Thank you, Mariana, for that phrase.)
10:42 am. Put it in the fridge.
3:55 pm. Take out of fridge. Mix in 40 g cold starter, last fed 3 days ago, 100% hydration.
4:00 pm. Mix/knead in (by hand) 25 grams more water. I just went by feel to determine the amount.
4:00 - 4:15 pm. Knead by hand.
4:35 - 7:42 pm. Did various stretch and folds, at least 5, maybe up to 7.
8:45 pm. Put dough in lined 8" inner-diameter banneton. Liner was just a thin "flour sack" style tea-towel, doubled over, dusted with 50/50 mix of white rice flour and AP flour.
8:50 pm. Covered, placed in plastic shopping bag, put in fridge.
May 7, 2021.
7:45 am. Remove from fridge and bag. Not any noticeable expansion. Leave at room temp until time to bake.
7:50 am. Start oven preheat to 475/450* F. With Lodge 3.2 qt combo-cooker on 3rd rack up from bottom. Bottom rack has a 14" cordierite pizza stone, 1/4" thick, to block radiant heat from the bottom heating element.
8:24 am. Desired oven temp reached. Give it about 10 more minutes for combo-cooker to achieve desired temp.
8:35 am. Sprinkle corn meal on surface of dough as it sits in banneton. Place 8.5" circle of parchment paper on top of corn meal. Invert the deep pot half of combo cooker over the banneton. Invert banneton and pot together so dough falls in. Remove banneton from pot. Cornmeal and parchment paper now insulate the bottom of the dough from the pot. Dust/scrape off excess rice-and-AP-flour from top of dough. Score a plus sign with a bare double edged razor blade. The dry "skin" on the dough is noticeable, and you can see the wetter inside. This will make for a nice oven bloom.
Previous experience showed that the crust of whole grain durum loaves, which had soaked/autolysed for multiple hours, carmelized too much when initial baking temp started at 475/450. So this time, I'll start at 450/425*.
8:39 am. Bake covered, 450/425* F. 15 minutes.
8:54 am. Bake covered, 425/400* F. 22 minutes.
9:16 am. Nice oven bloom!
9:16 am. Bake uncovered, 425/400*. 14 minutes.
9:30 am. Crust and ears look browned just right.
Internal temp: 208.8 F. Passes thump test.
* First number is oven thermostat setting, second is actual.
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Paper plate is 9" in diameter.