Making Italian Tuna Salad is straightforward if you follow these steps:

1. Prepare the Ingredients: Gather and chop all your ingredients, including the tomatoes, onion, cucumber, olives, and parsley.

2. Combine the Tuna: In a large mixing bowl, add the drained tuna and break it apart gently with a fork.

3. Add Vegetables: Incorporate the cherry tomatoes, red onion, cucumber, and black olives to the bowl with the tuna.

4. Mix the Dressing: In a small bowl, whisk together olive oil, red wine vinegar, Dijon mustard, minced garlic, salt, and pepper until emulsified.

5. Season to Taste: Add fresh lemon juice and adjust the seasoning with additional salt and pepper if needed. The dressing should be tangy and flavorful.

6. Combine Everything: Pour the dressing over the tuna and vegetable mixture. Toss gently to ensure everything is well coated.

7. Let It Chill: Cover the salad with plastic wrap and refrigerate for at least 30 minutes. This allows the flavors to meld beautifully.

8. Serve and Enjoy: Once chilled, give it a final toss and taste for seasoning before serving.

This should yield a delightful salad that brings joy to your table!