• Step 1: In a medium bowl, combine the drained tuna, Greek yogurt, Dijon mustard, and lemon juice. Mix well until the ingredients are fully incorporated.
• Step 2: Fold in the chopped celery, red onion, and parsley. Season with salt and black pepper, and stir to combine.
• Step 3: Taste the tuna salad and adjust the seasoning as needed, adding more salt, pepper, or lemon juice to suit your preferences.
• Step 4: Serve the tuna salad immediately, or refrigerate until ready to use. It’s delicious on its own, in a sandwich, or over a bed of greens.