Creating Baked Marinated Chicken Salad with Mozzarella and Balsamic Vinaigrette is a straightforward process if you follow these simple steps:

1. Preheat the Oven: Begin by preheating your oven to 375°F (190°C).

2. Marinate the Chicken: In a bowl, combine olive oil, Italian seasoning, salt, and pepper. Add the chicken breasts, ensuring they are well coated. Let them marinate for at least 30 minutes.

3. Bake the Chicken: Place the marinated chicken on a baking sheet lined with parchment paper. Bake for 25-30 minutes or until the chicken is cooked through and reaches an internal temperature of 165°F (75°C).

4. Prepare the Salad Base: While the chicken is baking, wash and dry the mixed salad greens. Place them in a large bowl.

5. Add the Vegetables: Slice the cucumber and red onion, then add them to the bowl along with the halved cherry tomatoes.

6. Cube the Mozzarella: Cut the mozzarella cheese into small cubes and add them to the salad mixture.

7. Slice the Chicken: Once the chicken is cooked, remove it from the oven and let it rest for a few minutes. Then, slice it into strips.

8. Combine Everything: Add the sliced chicken to the salad bowl and toss everything together gently.

9. Dress the Salad: Drizzle balsamic vinaigrette over the salad and toss to coat all the ingredients evenly.

10. Serve: Transfer the salad to serving plates or bowls. Garnish with fresh basil leaves, if desired.

By following these steps, you will create a vibrant and delicious Baked Marinated Chicken Salad with Mozzarella and Balsamic Vinaigrette that is sure to impress.