10 Drought-Tolerant Vegetables to Grow in a Water-Saving Garden
9. Feuill de Chene Lettuce -- French, Fancy, and Surprisingly Hardy

Name a fancier lettuce than Feuill de Chene (oak leaf). I'll wait. It might sound high-maintenance, but this variety is actually shockingly drought-tolerant. It grows fast, resists bolting in the heat, and gives you delicate, buttery leaves with a little crunch.
Hot tip: Harvest outer leaves continuously to keep it producing longer.