Preheat your oven to 400°F (200°C).

Prepare the chicken. Slice each chicken breast in half lengthwise to create two thinner pieces. This helps the chicken cook evenly and absorb more flavour.

In a large bowl, combine the chicken breasts, basil pesto, and sun dried tomatoes. Toss everything together to evenly coat the chicken.

Place the coated chicken in a large 8 x 11-inch glass baking dish or on a sheet pan lined with parchment paper.

Bake in the oven for 9 minutes, then flip the chicken and cook for another 9 minutes, or until the thickest part of the chicken reaches an internal temperature of 165°F.

Remove the chicken from the oven and let it rest for 5 minutes before serving. Top with additional pesto and serve.