Radicchio and Plum Salad

Cook bacon in dry medium skillet over medium-low heat, turning occasionally, until crisp, 8–12 minutes. Transfer to paper towels to drain.

Reduce heat to low and cook shallot in same skillet, stirring often, until translucent, about 2 minutes. Add vinegar, oil, mustard, and 1 Tbsp. water and whisk until smooth.

Toss radicchio, plums, and olives in a large bowl. Drizzle dressing over; season with salt and pepper. Toss to coat.