Ah man, I don't think I do anything special. I wonder if it's spreading in whatever pot/pan/dutch oven you're cooking in? I'll try and list out step by step what I do.
I TRY to feed my starter for 2-3 days before I plan to make bread, but honestly, sometimes I pull it out the night before and feed it. I feed my starter 1:1 with Cairnsprings Glacier Peak.
1. Final feed is the night before right before I go to bed
2. Wake up, mix flour and water. Autolyze for at least 30 minutes up to as long as I can depending on my meeting schedule
3. Mix in starter, rest for 30
4. Mix in Salt and add a little bassinage to help incorporate.
5. Transfer to a bigger bowl, fold every 30 minutes awhile. I dont have a hard and fast time. It's by feel at this point. During the winter it can be as long as 6 hours during the summer it can be as short as 6 hours
6. Transfer to counter, cut in half and preshape. Cover and rest for 10 minutes
7. Final fold and prep and roll into brotform. It isn't a special one, I think I got it from Amazon.
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8. Next day heat up oven for 30 minutes (as hot as you can get it), then put in cast iron dutch oven to pre heat (or whatever your going to cook in). I use this old cast iron dutch oven we found at my grandmothers after she passed (it has two uses--bread and popcorn).
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9. Pull bread out, score and place in dutch oven
10. Cook for 20 minutes with lid on, 20 without. Make sure bread is somewhere around 210* (I think?)