Not exact matches
To start, I have seen some books
suggested dark rye flour, bottled distilled or spring water or even pineapple juice to attract the growth of the right microorganism in the starter but I have used just tap water,
rice syrup and bread flour to start mine...
I would almost
suggest raw cow, goat, or sheep milk as a substitute for formula, but they are high in protein and should be topped up with a fat (egg yolks if tolerated are good, beef fat or other animal fats, coconut oil are possibilities) and a carb (
rice syrup may be a good choice).
Have decided to go for the
rice syrup option as you
suggest — had a bad flare - up of AS inflammation last night after eating about twice the amount of squash that I normally have (someone else giving me v generous portions).