In a large bowl, mixthe first eight ingredients(chopped)
Gently stir in the tuna.
For a dressing: In a small bowl, combine the vinegar, crumbled feta cheese,
parsley, oregano, garlic(minced),salt and pepper.
Whisk in the oil. Pour over salad; do not toss.
Cover and refrigerate for at least 1 hour.
Toss just before serving.