Mediterranean Tuna Salad - Fully Mediterranean

Ingredients

• 2 5-ounce cans solid white albacore tuna, well drained
• 3/4 cup celery (finely sliced)
• 1/4 cup red onion (diced)
• 1/2 cup red bell pepper (diced)
• 8 kalamata olives (sliced)
• feta cheese (crumbled, for garnish)
• 1 tablespoon fresh flat-leaf parsley (chopped, for garnish)
• zest of half a lemon
• 1 tablespoon lemon juice
• 1 1/2 teaspoon Dijon mustard
• 1 1/2 tablespoon olive oil
• salt and pepper to taste