01 -
Preheat the grill to medium-high heat. Refer to stovetop instructions in the notes section for an alternative method.
02 -
Pound the chicken breasts to an even thickness of 3/4 inch. Place them in a large bowl, drizzle with olive oil, and sprinkle salt, pepper, and garlic powder on all sides. Add lemon zest and thyme, tossing to coat evenly.
03 -
Place the chicken on the hot grill, cover, and grill for 5-6 minutes until grill marks form. Turn the chicken over, cover again, and grill for another 5-6 minutes. Turn once more, lower the heat, and cook until the thickest part of the breasts reaches 160°F. Top each piece with a slice of mozzarella, cover, and grill until the cheese is melted, about 4 minutes.
04 -
While the chicken grills, prepare the tomato salad. Combine tomatoes, basil ribbons, minced garlic, olive oil, balsamic vinegar, salt, and black pepper in a bowl. Toss well. To make basil ribbons, stack the leaves in the same direction, roll them up, and thinly slice.
05 -
Transfer the grilled chicken to a platter and spoon the tomato salad over the top. Optionally, drizzle with balsamic glaze and a small amount of basil pesto. Serve immediately.