Step 1: Prepare the Oven and Baking Dish
Preheat your oven to 425°F.
Spray a large casserole dish with cooking spray or lightly coat it with olive oil to prevent sticking.

Step 2: Season the Chicken
Place the chicken breasts in a single layer in the prepared baking dish. Drizzle with olive oil and sprinkle both sides with salt, black pepper, paprika, garlic powder, and Italian seasoning. Use tongs to flip and make sure every side is fully coated with the spices.

Step 3: Add the Pesto
Spoon basil pesto over each chicken breast. Use a tablespoon to spread the pesto around, flipping the breasts carefully to coat both sides evenly. The pesto will act as both seasoning and sauce as the chicken bakes.

Step 4: Top with Cheese and Tomatoes
Place slices of fresh mozzarella on top of each chicken breast. Scatter the halved cherry tomatoes over the top, letting them fill in the gaps around the chicken. The tomatoes will roast and burst slightly, adding fresh flavor to the dish.

Step 5: Bake the Chicken
Cover the casserole dish with foil and bake in the preheated oven for 25 minutes. Remove the foil and bake uncovered for another 10-15 minutes, until the mozzarella is melted and bubbly and the chicken is fully cooked through. Let it rest for a few minutes before serving to lock in all the juices.