In a large bowl, combine the Italian dressing, olive oil, minced garlic, oregano, basil, salt, black pepper, and lemon juice. Whisk until well blended.
Place the chicken breasts in a resealable plastic bag or a shallow dish. Pour the marinade over the chicken, ensuring all pieces are well coated.
Seal the bag or cover the dish and refrigerate for at least 1 hour, or up to 8 hours for more flavor.
Preheat your grill or oven to 375°F.
Remove the chicken from the marinade and discard the marinade.
Grill the chicken for 6-7 minutes per side or bake in the oven for 25-30 minutes, or until the internal temperature reaches 165°F.
Let the chicken rest for 5 minutes before slicing and serving.