Day 1
Place the rhubarb in a bowl (the rhubarb acts as a catalyst to start the fermentation). Pour on 100g of water; then mix in 50g of strong white bread flour and 50g of wholegrain rye flour to make a thick paste. Leave somewhere warm for 24 hours, loosely covered with clingfilm.
Day 2
At around the same time the following day mix in 50g of water; 25g of strong white bread flour and 25g of wholegrain rye flour; and leave somewhere warm, again loosely covered. If there is a skin on top, just mix it in.
Day 3
Same as day 2.
Day 4
You should start seeing the beginning of the active fermentation. Same as day 3.
Day 5
The mother should be bubbling away and smell tangy. Stir; then pour 30g of the mother into a larger bowl and pick out any bits of rhubarb. Discard these, as the rhubarb has done its job, though it should have all broken down by now. Whisk in I25g of water; then stir in 80g of strong white bread flour; 30g of wholegrain rye flour; and 30g of strong wholemeal flour until well incorporated. Cover loosely and leave in a warm place. Discard the leftover starter – there is a fair bit but it’s the price to pay to get it up and running.
Day 6
Same as for day 5 (apart from picking out the rhubarb).
Day 7
MAKE BREAD! Once you have made your sourdough you can re-feed the mother and bake more, or store it in the fridge without feeding, but it will take a few days to re-start it by feeding it again as for day 5. The mother will keep happy for many months before it needs feeding again.
Use this sourdough starter recipe to make Justin’s Rye and Malt Sourdough.