For making the sourdough starter, whisk 50g potent white flour and 50g strong wholemeal flour with 100ml somewhat warm water right up until clean. Transfer to a large jar or plastic container. Leave the lid ajar for one hr or so inside a heat position, then seal and set aside https://chanceybwqg.blogkoo.com/the-2-minute-rule-for-sourdough-bread-san-francisco-47820040