Serves 4
Be sure to press the spinach well in step 2. One small red onion can be substituted for the shallots. Using a Dutch oven (rather than a skillet) makes it easier and faster to wilt the spinach.
1. Plump raisins in bowl of hot water, about 5 minutes. Toast nuts in Dutch oven over medium heat, stirring often, until golden, about 5 minutes. Transfer to plate.
2. Heat 1 tablespoon oil in now-empty Dutch oven over high heat until shimmering. Add spinach in handfuls, stirring to allow each batch to wilt slightly before adding next. Continue to cook until spinach is uniformly wilted and glossy, about 1 minute. Transfer spinach to colander set over bowl and press with wooden spoon to release extra liquid.
3. Wipe out Dutch oven, add remaining 2 tablespoons oil, and set over medium heat until shimmering. Cook shallots until softened, about 3 minutes. Drain raisins and add to shallots. Stir in vinegar and sugar and cook until syrupy, about 2 minutes. Add spinach and toss to coat. Season with salt and sprinkle with nuts. Serve.