Daphne Oz's Italian Tuna Salad

Slightly modified from The Chew.
Ingredients:
3 cans high quality canned tuna (packed in olive oil)
1/2 red onion (sliced thin)
1 red bell pepper (cored, seeded, and diced)
1 apple (cored and diced)
2 ribs celery (diced)
4 scallions (thinly sliced)
1 clove garlic (minced)
1/4 cup green olives (sliced)
1/2 bunch flat leaf parsley (chopped)
1/4 cup olive oil
4 tablespoons red wine vinegar
Salt
Freshly ground pepper
10 slices bread

Open the tuna, drain the oil. Combine the tuna, red onion, red bell pepper, apple, celery, scallions, garlic, green olives and flat leaf parsley and toss together in a large bowl. Combine the olive oil, red wine vinegar, and a pinch of salt and pepper in a small bowl and pour over the tuna and vegetable mixture, and toss until just combined. Serve on whole grain bread.