Mango Vegetarian Stir Fry is one of the new 600 calorie options on the Silver Diner’s new menu. Pictured is a family style serving not actually offered on the menu. The Silver Diner is rolling out updated menus across their locally owned mini-chain of eateries this month. The new menu features hormone-free burgers, 600 calorie and gluten-free options, and plans to bring in nitrate-free bacon. The menu has also been updated to feature local…