This Pesto Chicken Sandwich is a delicious and satisfying meal that combines tender grilled chicken with the bold flavors of pesto sauce. The chicken is marinated in a mixture of olive oil, garlic, and herbs, then grilled to perfection. The sandwich is assembled with a spread of pesto sauce, slices of grilled chicken, fresh tomatoes, and lettuce, all sandwiched between two slices of crusty bread. It's a perfect option for a quick and easy lunch or dinner.