She had the recipe. But the recipe was useless.

The air in the spice shop was a map of the world. Turmeric stained the light yellow, cumin seeded the shadows, and somewhere in the back, a cinnamon stick lay like a fallen branch from the Garden of Eden. Priya, a young chef who had just inherited her grandmother’s kitchen—and her grandmother’s cryptic, handwritten recipe for garam masala—stood before a wall of glass jars.

Mr. Mehta chuckled, his beard smelling of cardamom. “In my grandfather’s time, a masalchi didn’t measure with spoons. He measured with memory. An index isn’t a quantity. It’s a logic .”

She ground it all to a powder the color of dusk.