Here’s a pet peeve of mine: recipes for “easy weeknight dinners” that aren’t even close to nutritionally dense or satisfying. A pasta with tomato sauce or a leafy salad is not dinner, especially if you’re feeding a family. We need complete proteins, carbs, and vegetables in an easy, quick, and cheap package—bonus points if it doesn’t create a lot of dishes to wash. A tall order, for sure, but one that most Texans need to fill nearly every night.So when I set out to write a recipe for black bean soup, I knew I wanted the dish to be a full meal, not just a zhuzhed-up can of beans. This soup fits the bill: There are vegetables in it (although a side salad would be…