The only problem with amba — the habit-forming, incandescently bright mango pickle found on the bar of every falafel shop — is how long it takes to make. Days, if you’re doing it the old-fashioned way ...

A blend of unripe green mango, white vinegar, and spices like fenugreek, cumin, and tart sumac punches up this sour condiment. Some versions of amba are fully pureed, but this recipe retains chunks of ...