Forget the last one happened. Call it intelligence, call it talent, or call it my new Le Creuset Dutch Oven, but I figured out Leek and Potato soup. It's actually a really simple formula, and kinda makes me feel dumb for not figuring it out the first time.
Salt to taste
The formula is:
1 cup solids to 1 cup liquid to 1 Tb Heavy Cream
Therefor, if you have like a potato and a leek, you would do 1/2 cup Potato, 1/2 cup Leek, 1 cup water, 1 Tb Heavy Cream.
Or, if you're feeding a huge Italian family, you would use 50 cups Potato, 50 cups Leek, 100 cups Water, and 100 Tb Heavy Cream. Or just go to a restaurant because no one has a pot that big.
Cut up and clean veggies, put them in a pot with water. Boil until mushy gushy in your tushy. Buzz it with an emersion blender or in a food processer or a food mill or between your teeth if you're EXTREME. Add cream and salt to taste.