this recipe from one Julius Roberts is elementally easy and excellent:
1.5 litres of quality chicken broth
4 cooking chorizo, my favourite are the Brindisa ones.
3 large leeks
10-15 new potatoes
Bunch of parsley or cilantro
Chop up the leek, potato and chorizo into rough bite size pieces, chuck into a large pot, cover with the chicken stock and bring to a gentle simmer. Season well with a proper handful of salt and cook until the vegetables are tender but not falling alert. Whack in a big handful of chopped parsley. Taste again and adjust the seasoning as necessary.