Steps
1. In a small bowl, combine mayonnaise, Dijon mustard, and horseradish; mix well to create the mustard sauce.
2. In a salad bowl, add mixed greens, cherry tomatoes, and cucumber slices.
3. Toss the vegetables with the olive oil, salt, and pepper.
4. Add shredded chicken to the salad.
5. Drizzle the mustard sauce over the salad and toss gently to coat evenly.
6. Serve immediately and enjoy the zesty flavors.