Tuna salad (based on this and this):
Drain good canned tuna into a mixing bowl. Add chopped vegetables (I used shredded red cabbage and matchstick carrots, which you can microwave for 15 seconds to soften slightly; you could also use the traditional celery or cucumber), and throw in some sweet pickles or pitted olives for more flavour. Then mix with a touch of mustard, mayonnaise (optional), and a bit of salt and pepper to taste. Optional: add hummus or unsweetened peanut butter for even more protein and moistness.
Egg salad with hummus or smoked salmon:
Slice boiled eggs and season with salt, pepper, a dash of mayo, and either mustard or curry powder. Add shredded carrots, radish chips, and either spring mix or alfafa sprouts.