Preheat the Oven:
Preheat your oven to 375°F (190°C).
Prepare the Chicken:
Pat the chicken breasts dry with paper towels to remove any excess moisture.
Lightly season both sides of the chicken with salt, pepper, garlic powder, and oregano.
Coat with Pesto:
In a small bowl, combine the pesto sauce and olive oil. Mix well to combine.
Place the chicken breasts in a baking dish and generously spoon the pesto mixture over each chicken breast, making sure the entire surface is coated.
Add Sliced Tomatoes:
Arrange the sliced tomatoes evenly on top of each chicken breast, gently pressing them into the pesto sauce.
Bake the Chicken:
Cover the baking dish with aluminum foil and bake for 25-30 minutes, or until the chicken reaches an internal temperature of 165°F (75°C). If you want the top to be extra crispy, remove the foil in the last 5 minutes of baking.
Garnish and Serve:
Once the chicken is fully cooked, remove it from the oven. Sprinkle with freshly grated Parmesan cheese and garnish with fresh basil leaves for extra color and flavor.
Serve:
Serve your Best Baked Pesto Chicken with Sliced Tomatoes with pasta, roasted vegetables, or a light salad for a complete meal.