Noodle soup with any vegetables available.
Cous-cous with things like olives, capers, spring onions and diced cheese, I usually have feta to hand.
Bean salad or bean soup depending how lazy I am.
Lentils with onions, diced ham/bacon, tinned fish,
Potato salad with leftover ham/sausage, any vegetables.
Pasta with sardines or tuna or tomatoes or Primavera with any green vegetables.
Soup with what is available, often onions, or beans, or potato & leek.
Anything on toast, especially sardines.