¼ Cup Canned Tuna With Capers & Lemon = 80kcals

This is one of the simplest and tastiest snacks you can rustle up from ingredients left around in your cupboard (no capers? Opt for that jar of gherkins you've had lying around instead). Add that to the fact that it's full of minerals, detoxing lemon and protein, and it's not bad for you nutritionally, either.