If you manage to purchase prepared paunch, then start here.
Wash the paunch, chop it and start to boil it with 1 quart water.
Wait 20 min, add the milk.
Wait 10 min, add salt and some cooking oil.
Boil for 5 min.
In an additional small pot, mix the chopped garlic and the vinegar.
Serve the soup and flavor it with the garlic mixture and the chili spice.
If you like black pepper spice, you can add it to flavor the soup.
For best taste, the soup must be consumed hot.