Step 1

Purchase ripe but still firm tomatoes so they will hold their shape when grilled.

Step 2

Combine basil, vinegar, garlic, ½ teaspoon salt, and ¼ teaspoon pepper in bowl. Slowly whisk in oil until thoroughly incorporated. Transfer 2 tablespoons vinaigrette to bowl and toss with mozzarella; reserve remaining vinaigrette.

Step 3

Pat chicken dry with paper towels and season with salt and pepper. Grill chicken and tomatoes over hot fire until chicken is well browned and tomatoes are lightly charred, about 2 minutes per side. Transfer chicken to platter. Top with tomato slices and drizzle with reserved vinaigrette. Cover with even layer of mozzarella and tent loosely with foil. Let rest for 5 to 10 minutes. Serve.