Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Place the halved baby potatoes on the prepared baking sheet, drizzle with olive oil, and season with salt and pepper. Toss to coat evenly.
Push the potatoes to one side of the baking sheet, creating space for the chicken breasts.
Season the chicken breasts with salt and pepper, then place them on the cleared side of the baking sheet.
Spread pesto sauce evenly over each chicken breast.
Scatter cherry tomatoes around the chicken and potatoes.
Bake in the preheated oven for 20-25 minutes or until the chicken is cooked through, and the potatoes are tender.
Remove the baking sheet from the oven and sprinkle shredded mozzarella cheese over each chicken breast.
Return the sheet pan to the oven and broil for an additional 2-3 minutes, or until the cheese is melted and bubbly.
Garnish with fresh basil if desired.
Serve the Mozzarella & Pesto Chicken Sheet Pan Dinner hot, embracing the vibrant flavors of pesto and gooey mozzarella for a delicious and fuss-free meal. Enjoy!