If you can find a Lievito Madre from a good, good friend, you only need 100 grams of it and you can maintain it for a long, long time. Only drawback, is you need to feed it once a week.
Here is a recipe to feed the Lievito madre
100 Gr. Sourdough – Madre
200 Gr. Flour – 14/15 Protein – Try to use bread flour – T50 type or 0 type or Manitoba Flour work best for the feeding.
82 Gr. Water – (42%) at 28 Degrees Celsius
If you want to keep it fresh and alive… the starter needs a weekly bath, to remove some of the acidity it will develop during the resting period. Take it out of the fridge an hour before bath time and when it is at room temperature, cut 100 gr. of dough in small pieces and soak them in
2 Litres water at 28 Degrees Celsius with 4 grams Sugar.
Mix well and make sure the sugar has dissolved. Add the pieces and let them soak in the water for 15 minutes.
Drain the pieces and add 200 grams of flour with 82 grams of water, just like a regular feeding.
Mix and knead the mixture until you have a soft and tender strip of dough you roll out, just like a cake roll.
Make a cross in the middle and let it grow…
Leave it a room temperature for 2 hours and it will rise to the occasion…. literally !
You can store the remaining starter in the jar and make sure you make a cross on top –