Purslane has a lemon undertone that sharply contrasts with the earthiness of the beans; look for it at farmers' markets or specialty stores from July to October. If purslane is not available, use watercress instead.
Chickpeas and feta take care of the protein requirement, olive oil brings good fats, and whole-wheat couscous and broccoli make up the healthy carbohydrates.
Night before: Combine all the ingredients and refrigerate this salad in an airtight container.
To make this on the stovetop, cover the pot after bringing the liquid to a boil and keep the mixture at a steady simmer over medium-low, 25 to 30 minutes.
Try another variation of this go-to dinner: Spiced Yellow Rice with Chicken and Vegetables, Chicken with Rice, Broccoli, and Scallions, or Chicken and Rice with Corn and Sun-Dried Tomatoes.