The round loaves above are zero yeast pure sourdough but the batards with cheese are a hybrid using the starter and also some dried yeast, both good flavour but think I’d prefer more sour think this can be achieved with a bit of sugar for the enzymes to feed on.
Avoiding yeast must be hard it’s on trust that the baker hasn’t added some yeast to give them a helping hand.
I’ll put up my recipe later basically flour and water or in my recent recipe pineapple juice apparently stops a couple of nasties appearing, mixed in a container left to brew over a few days adding a little water and flour to feed then within 8 days you have created your starter or mother which then goes in a jar in fridge and gets fed and used as required pretty simple really for a great tasting product !
This mornings effort after proofing overnight got a bit stuck to the bannetons, so work in progress maybe more flour needed still smell lovely though and I’m sure will taste good later