@Griffin57 : I don't know how authentic a Spanish person would say this is but it certainly works for me! I had black lentil soup every time I saw it on the menu so it is at least up to my own exacting standards. Here goes:
1,5 litres of boiling water, two veg stock pots (I am ill, I do not make stock)
Two onions, one stick celery, lots of garlic and 100 g chorizo all finely-ish chopped. Two big carrots, roughly grated (easier and faster than chopping), a small leek in chunky slices, a few chopped new potatoes with the skin on and 50 g black lentils. Leave to simmer until you can't stand smelling it without having it anymore. Dunky bread optional.
That's it and that's all - no added salt, spices, tomato etc needed (in my humble opinion). Quick, easy and healthy, and very very tasty even with a cold!