1.
Prepare pasta according to the directions on the package; drain and rinse with cold water. Set aside and let cool; about 5 minutes.
2.
Transfer pasta to a deep salad bowl and add halved tomatoes over pasta. Layer tuna over tomatoes. Add sliced olives over tuna and set aside.
3.
In a mixing bowl, whisk together minced garlic, lemon zest, pinch of salt, lemon juice, olive oil, water, salt and pepper; whisk until thoroughly combined.
4.
Add salad dressing to pasta; toss to combine.