Prepare the balsamic sauce by combining balsamic vinegar, honey, olive oil, minced garlic, and Dijon mustard in a bowl. Whisk until smooth and set aside.

Prep tomatoes and mozzarella by halving the grape tomatoes and mixing them with mozzarella balls and chopped basil in a bowl. Season with salt and pepper, and set aside.

Sear the chicken in a hot skillet with olive oil, seasoning with salt and pepper; cook for 1-2 minutes per side until golden brown.

Combine by pouring the balsamic sauce over the chicken, adding the tomato and mozzarella mixture. Bake in a preheated oven at 400°F for 18-23 minutes until chicken is fully cooked.

Rest the chicken for 5 minutes after baking. Garnish with fresh basil and serve.