I start by slicing the onions evenly into half-circle strips. This helps them cook uniformly. I soak the raisins briefly in warm water to plump them up, which keeps them soft and juicy in the dish.
Heat the oil in a non-stick pan and sauté the onions over medium heat until they soften. Once soft, I lower the heat and add ginger, turmeric, cinnamon, and salt, letting the spices infuse slowly.
After 20 minutes, I stir in the sugar and raisins. I continue cooking gently until the onions caramelize slightly and the raisins are tender. This brings out the perfect balance of sweet and savory.
I like serving the Tfaya directly on top of couscous, letting the sweet sauce drizzle over it. Alternatively, you can keep it on the side for guests to add themselves.