Among the Orthodox in Israel, veganism is “getting stronger,” said Yossi Wolfson, an animal-rights activist, vegetarian since 1975, vegan since 1992, and coordinator of the Ginger Vegetarian Community Center in Jerusalem. “It’s not a revolution, but it’s a process.”

And Ori Shavit, a writer who founded the blog Vegans on Top, says she has seen a rise in inquiries from Orthodox vegans about vegan cooking workshops she runs. “More and more people ask me if it’s kosher,” she said.