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you don't need to do sourdough, though! i think this is mostly just the technique. i'm pretty sure you could 100% do a preferment like you might for any bread - i'd do 100g of water and 100g of flour, and a pinch of yeast, and then proceed from there.
incidentally you could also just make an instant sourdough starter by using commercial yeast and yogurt whey. that's what i do when i start them so that they never fail. :V
you don't need to do sourdough, though! i think this is mostly just the technique. i'm pretty sure you could 100% do a preferment like you might for any bread - i'd do 100g of water and 100g of flour, and a pinch of yeast, and then proceed from there.
