You could substitue a dash of Liquid Smoke, available in a lot of grocery stores in the sauce section (near the steak sauce, etc). It's also great in lots of dishes.
The recipe is from BEN & birdy
*Cheapness/easiness cheat: I used two bags of frozen spinach, which I always keep on hand; and store-brand red wine vinegar instead of sherry vinegar, and it still tasted great.
Smokey Saucy Chickpeas with Spinach