normal salad. You can be as adventurous as you like (obviously the less adventerous the easier it is to do). Some ingredients that can be thrown in to add taste and texture...lettuce, tomato, cucumber, celery (I think it ruins a salad, but some people like it), spring onions, carrots (I think that the best way to 'cut them' is with a peeler), apple, cooked beetroot, olives, cheese, chicken breast, boiled eggs, ham, sunflower seeds, sliced almonds, pine nuts, frozen peas (allowed to defrost), brocolli, spinach, raisins, chopped dried apricots, peppers (red and yellow generally preferred), grapes (best cut in half), tuna, pasta, potato (not TOO cooked), crushed dried noodles...there's loads of options; experiment and you'd be surprised at what tastes nice. Even just tomato and cucumber chopped up and soaked in olive oil, balsamic (or cider/red wine) vinegar and a sprinkle of salt and pepper is more than edible to most people.
Fruit salad (nice with natural yogurt and honey), celery with peanut butter, carrots and dip, purchase a juicer if you don't have one and use it (it's not an easy thing to wash though, but carrot juice is surprisingly tasty!), smoothies (bought frozen veg is easier; thrown in a blender with yogurt and milk, or juice), soup (again, experiment and surprise yourself; almost any 'cookable' veg can be thrown into a soup...some stock and a few spices and you're good to go :-) ) .
Try to replace your daily 'quick snacks' with a piece of fruit or a handful of berries. And when your making your evening meal just be sure to boil/steam/microwave some simple vegetables if there're none in the main course.
...hope those few tips help a bit. I know they're not all the 'easiest' ideas, but they're not too difficult either :-)