Take out 4 plates or containers and put one handful of mixed salad on each plate.
Put a heaping 1/4 cup of coleslaw in the middle of each plate. Then, top the coleslaw in each plate with 1/4 cup of canned tuna fish.
Surround the coleslaw and tuna with the remaining salad ingredients on each plate (1 beet per plate, 4 cherry tomatoes per plate, ¼ of the sliced cucumber per plate, 1/4 of the bell pepper slices per plate, 1 hard boiled egg per plate, and 1/4 of the sliced avocado per plate).
Sprinkle some apple cider vinegar on top of the salad. You could also make a quick vinaigrette to top it with, but I find that the dressing in the coleslaw is enough for the salad itself.