Lightly oil an oven-proof pan and heat to medium-high on the stovetop.
Season chicken with garlic powder, salt and pepper.
Cook chicken until cooked through, 6-8 mins per side.
Reduce heat, and top each chicken with 2 Tbsp pesto and fresh mozzarella.
Broil chicken in the oven for another 2-3 mins until the cheese is bubbling and melted.
In a small bowl, combine tomatoes, salt, pepper and half fresh basil.
Remove chicken breast from pan and plate. Top with tomatoes, balsamic glaze and basil garnish. Serve warm with crusty garlic bread and fresh, mixed greens.