Mix the chicken marinade ingredients together in a bowl. Add the chicken, turning to make sure the chicken is completely coated. Cover with plastic wrap and put it in the fridge to marinate for about 30 minutes.
Meanwhile, preheat the oven to 425 °F . Cover a baking sheet with aluminum foil and spritz it with nonstick spray.
In a large bowl, stir the chopped sweet potato cubes together with 1 teaspoon olive oil, ¼ teaspoon of salt and a pinch of black pepper. Spread the sweet potato cubes evenly in a single layer on the baking sheet, pop them in the oven, and bake for about 30 minutes. At the 15-minute mark, you'll want to stir the sweet potato cubes around a bit.
Once the potatoes are done cooking, you can fire up the grill and cook the chicken until a thermometer registers an internal temperature of 165 °F
Let the chicken rest for about 5 minutes before chopping into bite-sized pieces
Mix the dressing ingredients together in a small bowl.
Toss together the sweet potatoes, the grilled chicken, the chopped avocado, chopped tomatoes, chopped basil, mozzarella and dressing.