I am cooking this right now. I had a lot of leeks that I needed to dispose of before going on vacation. My criteria while looking for a recipe was the one that calls for the most leeks. This one popped up on the Spanish-language website Terra. So the following is a translation for Recipezaar. Since I only used what was here in my kitchen, I can't really suggest what size vegetables to use, so use your discretion. If you don't like onions don't use a big one, if you want a thicker soup use a bigger potato, etc.