First of all - and just to put everyone mind at rest - there is no such thing as true sourdough bread that's 'quick' or can be made without a sourdough starter. Yes, you can make sourdough bread without a starter, for example, San Francisco Sourdough Bread. This bread is made from 'scratch' without 'starter', but it takes about seven days to make as you gradually increase the amount of fermenting dough. The flavour is amazing, and it's certainly worth making an effort to make this bread. So, whilst made without a sourdough starter, it's certainly not quick!