Add all of the chicken marinade ingredients to a large bowl, or plastic zip top bag, mix well. Add the chicken and marinate for at least 1 hour, or up to overnight.
Preheat the oven to 375℉, line a large baking sheet with parchment paper. In a large bowl, or directly on the prepared sheet pan, toss the bread cubes with the olive oil and seasoning. Spread evenly on the prepared baking sheet. Bake for 12-16 minutes, or until croutons are brown and crispy, flipping halfway through. Cool before serving.
Add all of the dressing ingredients to a jar with a tight fitting lid, reserving 2 tablespoons of the parmesan cheese for sprinkling on the salad before serving. Shake vigorously. Place in the refrigerator to chill. Keep lettuce in the refrigerator until ready to assemble.
Preheat an outdoor grill or indoor grill pan on medium high heat. Grill chicken until an instant read thermometer reads 165℉, about 3-5 minutes per side depending on thickness of chicken. Rest for 5 minutes before slicing.
When ready to serve, place the lettuce in a large mixing bowl. Spoon about half of the dressing onto the lettuce and toss gently until even coated. Top with the croutons, grilled chicken, and remaining parmesan cheese. Serve immediately with the reserved dressing.