2. Heat the oil in a medium-size saucepan over medium-low heat. Scrape the sesame-peanut blend into the warmed oil and roast the mixture, stirring, until it starts to release its own oils and loosen, turning crumbly and nutty brown, 5 to 8 minutes.
3. Meanwhile, drain the potatoes.
4. Stir the turmeric into the sesame-peanut blend and cook for 5 seconds. Then add the potatoes, tomatoes (with their juices), 1 cup water, and the salt. Stir once or twice, raise the heat to medium-high, and bring to a boil. Then reduce the heat to medium-low, cover the pan, and cook, stirring occasionally, until the potatoes are fork-tender and the sauce has thickened, 25 to 30 minutes.
5. Stir in the cilantro and curry leaves, and serve.
From 660 Curries: The Gateway to the World of Indian Food by Raghavan Iyer (Workman Publishing Company, 2008). Copyright 2008 by Raghavan Iyer. All rights reserved.
Adam Rapoport, editor in chief of Bon Appetit magazine and the website www.bonappetit.com, knows his way around a grill. He has edited an entire book on the subject: The Grilling Book: The Definitive Guide from Bon Appetit.