Close-up of a glass jar with sourdough fermenting on a checkered cloth

sourdough fermentation glass jar yeast activity closeup bubbly texture checkered cloth baking bread kitchen food cooking homemade culinary dough natural process active starter leaven healthy organic nutrition background rustic ingredient ferment wheat fresh flour sour bubble white bakery artisan gluten loaf recipe cook cereal traditional rye pastry protein preserved leavening grain fast motion timelapse