lentil-soup.md: Adjust lentils

Now that I have a scale I can try to be more exact about the weight,
and according to online "dry lentils" equivalencies 1 cup is 200 g.

See: http://www.cookitsimply.com/measurements/cups/lentils-dry-all-0070-014i0.html

lentil-soup.md

@@ -15,12 +15,12 @@ View with JavaScript disabled or else there is an annoying popup asking you to s
 - Pinch of ground chile powder or cayenne, more to taste
 - 1 quart chicken or vegetable broth
 - 2 cups water
-- 1 cup red lentils (rinsed and soaked)
+- 1 1/2 cup red lentils (rinsed and soaked for thirty minutes)
 - 1 large carrot, peeled and diced
 - Juice of 1/2 lemon, more to taste
 - 3 tablespoons chopped fresh cilantro
 
-Note: I approximate 1 cup as about 250 ML, though this should be slightly less for fluid volume.
+Note: I approximate 1 cup as 200 grams.
 
 ## Method