In a small bowl, combine Italian seasoning, paprika, garlic powder, salt, and black pepper. Rub this spice mix evenly over both sides of the chicken breasts.
Heat a greased grill pan over medium heat. Grill the chicken for 3-4 minutes per side, or until the internal temperature reaches 165°F. Let the chicken rest for 5 minutes before slicing thinly.
While the chicken cools, grill the zucchini slices until tender-crisp, about 2-3 minutes per side.
In a large mixing bowl, toss together cabbage, shredded carrot, sliced green onions, grilled zucchini, and chopped red onions.
In a mason jar, combine freshly squeezed lemon juice, olive oil, a pinch of crushed red pepper, salt, and pepper. Shake well to emulsify the dressing.
Pour the dressing over the salad and toss thoroughly to coat every ingredient.
Top the salad with sliced chicken and serve immediately. Enjoy!