*Make sure to buy baby arugula, which has a feathery texture. Mature arugula sold in bunches is much too spicy. For a substitute, use any baby green like baby spinach or mixed greens.

Make ahead tips: Roast the sweet potatoes and make the dressing in advance and refrigerate for up to 2 days. Warm the sweet potatoes to room temperature in the oven before assembling the salad.