Swan Boats and Kids
On Charles Street- so just through the garden across Beacon Street- theres Cafe Bella Vita, as well as an Upper Crust on that end of the street. If you feel like walking further down-closer to MGH is Panificio which has some tasty sandwiches as well.
On the other side of the gardens- on Boylston Street is Parish Cafe- again- pretty good sandwiches.
Apparently I equate lunch to sandwiches....