Creating this delightful Pasta Salad with Grilled Chicken and Crispy Parmesan Croutons is straightforward. Follow these steps for the best results:

1. Cook the Pasta: Bring a large pot of salted water to a boil. Add pasta and cook according to the package instructions. Drain and rinse under cold water; set aside.

2. Prepare the Chicken: Season the chicken breasts with olive oil, Italian seasoning, salt, and pepper in a bowl. Let them marinate for about 10-15 minutes.

3. Grill the Chicken: Preheat your grill or grill pan over medium-high heat. Cook the chicken for about 6-7 minutes per side or until fully cooked. Internal temperature should reach 165°F (75°C). Once done, let it rest for a few minutes, then slice into strips.

4. Make the Croutons: In a bowl, toss the cubed bread with 1 tablespoon of olive oil, garlic powder, and a pinch of salt. Spread them on a baking sheet and bake in a preheated oven at 375°F (190°C) for 10-12 minutes or until golden brown and crispy.

5. Prepare the Dressing: In a small bowl, whisk together balsamic vinegar, 2 tablespoons of olive oil, salt, and pepper to taste.

6. Combine Ingredients: In a large serving bowl, combine the cooked pasta, grilled chicken, cherry tomatoes, cucumber, bell pepper, red onion, and baby spinach.

7. Toss and Serve: Drizzle the dressing over the salad, toss gently to combine, and top with crispy Parmesan croutons. Garnish with fresh basil.