Yoghurt is dead easy to make - I had a couple of large lidded glass jars which I used to put on the cooker over the pilot light having mixed skimmed milk powder and milk together and then added a large spoonful of the mix from the other jar. By the following morning it had become yoghurt and was moved to the fridge. The other jar was emptied and left ready until needed again. I bought one small pot of live yoghurt at the start, and only ever needed to buy one more after leaving the jar out of the fridge when away for a weekend. These days I could feel virtuous for saving all the packaging, but back then recycling wasn't even heard of. I used to be quite thin back then, now I think about it.
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