These under-the-radar veggies offer super satisfying crunch — a texture a lot of dieters crave after giving up potato chips and other snack foods. You can munch your way through a whole can for just 50 calories. They're also super low in sodium, unlike most canned foods, so they won't make you bloated. Quite the contrary, their high water content will actually help minimize puffiness. Water chestnuts are a classic addition to stir fries and a crisp, refreshing mix-in for low-fat chicken or tuna salad.