Boil the egg, then set it aside to cool.
Steam broccoli and beans, then set aside. 2-3 minutes in the microwave with a little water or 3 minutes in a pot of boiling water does the trick.
Heat a little oil in a pan over high heat. Season the tuna with pepper on all sides, then place in the pan and cook for about 2 minutes on each side.
Add the spinach to your salad bowl or plate.
Cut the bell pepper, cucumber, and egg into bite-sized pieces. Add on top of the spinach.
Cut the radish into slices and mix together with the broccoli, beans, and olives. Add on top of the spinach salad.
Slice the tuna and add to the salad.
Whisk together the olive oil, balsamic vinegar, mustard, salt, and pepper.
Chop the parsley and add it to the vinaigrette.
Use a spoon to drizzle the vinaigrette over the salad.