01 - Preheat oven to 400°F. Lightly grease a baking dish large enough to hold chicken breasts in a single layer.
02 - Pat chicken breasts dry and rub with 1 tablespoon olive oil, 1 teaspoon sea salt, and 1/2 teaspoon black pepper. Arrange in prepared baking dish.
03 - In a food processor, combine basil, Parmesan, pine nuts, garlic, lemon zest, lemon juice, 1/4 teaspoon salt, and 1/4 teaspoon pepper. Pulse until finely chopped.
04 - With processor running, slowly drizzle in 1/2 cup extra-virgin olive oil until smooth pesto forms. Scrape down sides as needed.
05 - Spread generous layer of lemon basil pesto over each chicken breast, covering tops completely. Reserve leftover pesto for serving.
06 - Bake for 20-25 minutes until internal temperature reaches 165°F and juices run clear.
07 - Let chicken rest for 3 minutes. Serve with reserved pesto, lemon slices, and fresh basil if desired.