01 -
Steam or boil the green beans just until they're still slightly crunchy. Drain them and let them cool down.
02 -
In a large bowl, toss together the flaked tuna, drained corn, sliced fresh onions, halved cherry tomatoes, black olives, and bread croutons.
03 -
Once the green beans have chilled, mix them into the bowl with the rest of the ingredients.
04 -
In a small bowl, stir together the balsamic vinegar, olive oil, salt, and pepper to create your dressing.
05 -
Pour the dressing over the salad, give everything a good toss, and store it in the fridge until it's ready to be served.