Ingredients:
Day 1:
50 g wholegrain rye flour
50 g cold water
Days 2, 3, 4, and 5:
1 tbsp wholegrain rye flour
1 tbsp cold water
Method:
On day 1, just mix the flour and water together. Cover with a tea towel and leave at room temperature for 24 hours.
Each consecutive day, add 1 tbsp of...