If you're near Redwood City, drop in Whole Foods for lunch. They have a huge selection of pre-made sandwiches and salads. Go over to the bakery section to pick a dessert--the super expensive desserts are cut into individual portions and sold at reasonable prices! They have a big choice of hot food from the steam tables and a GIANT salad bar. The soups (there are usually 3 or 4 of them) are top-notch too. You don't have to grocery shop, just eat lunch there!