In a medium bowl, combine the halved cherry tomatoes, chopped basil, minced garlic, balsamic vinegar, oregano, olive oil, salt, and pepper. Mix well and set aside to marinate for 10-15 minutes.
While the tomato mixture is marinating, season the chicken breasts with salt and pepper, and place them in a baking dish in a single layer.
Spoon the marinated tomato mixture evenly over each chicken breast.
Top each chicken breast with shredded mozzarella cheese, ensuring even coverage.
Sprinkle grated Parmesan cheese over the mozzarella layer for an added flavor boost.
Bake in the preheated oven for 25-30 minutes, or until the chicken is cooked through (internal temperature should reach 165°F or 75°C) and the cheese is melted and bubbly.
Remove from the oven and let it rest for a few minutes before serving.
Notes
Let the dish rest for a few minutes before serving for better flavor.