There's nothing that tastes more like summer than a nice juicy, flavorful, grilled burger. This Caprese burger with homemade pesto mayo is extra flavorful with pesto and Parmesan added to the ground beef mixture. The chargrilled burger is added to an olive oil grilled bun and topped with mozzarella, a homemade pesto mayo, fresh basil, and a thick slice of tomato. Serve with your favorite summer side dish for the perfect summer meal!