I contacted one of the best chefs I ever worked with, to tell me how
to get a "sour" starter. He is German, but he now works at a four
star hotel in India as the executive chef. His name is Willy Hauter;
he is a specialist in breads, and spun sugar decoration. Give him the
credit, not me.

This was his reply:

Okay, this Is the procedure. You start with simple dough.

450 G. BAKING FLOUR
225 G. BEER (use German wheat, naturally fermented like An Endanger
Weiss bier
mix this and cover with a wet towel.

Keep it for 24 hours,
day 2, cut the dough in half and throw it out, and replace it with :
225 G. BAKING FLOUR
112 G. BEER
Continue procedure for 10 to 12 days

After 10-14 days, depending on the area, weather etc. your sour should
be fermenting nicely.
Make sure you cover it for the first 5 days with a wet towel,
afterwards, with plastic.

When finished, after measuring sour, use sourdough calculator to get
flour, salt,etc.
(this calculator is available at: samartha.net)

Work this dough well with your hands; Do not use a kitchenette or
other small machine as it will destroy the gluten with the sour.
Once you have the dough smooth, bench proof it for about an hour.
Then cut it in half, take one half and place it in a bowl. Add 250
GR.WATER, cover with plastic foil and place this in the fridge. This
will be your daily sour.
You will always use the same recipe; 500gr.HIGH GLUTEN FLOUR AND 250
gr.. WATER, 20 GR. SALT. ALWAYS use HALF IN THE FRIDGE AND WITH THE
OTHER HALF YOU WILL BE MAKING THE BREAD.
This recipe will give you one nice loaf of bread. Mold the bread in
long shape, like half of a French bread size.
Place this on an oiled pan, cover with a plastic, and place in the
fridge overnight. The next day bake it and enjoy. The bread will get
better and better.

1 pound = 453.59237 grams

Maj6th