In a small bowl, add the light mayonnaise, Greek yogurt, lemon juice, Dijon mustard, garlic powder, salt, and black pepper.
Using a whisk, mix until smooth.
In a large mixing bowl, add the chopped lettuce, tuna, celery, red onion, cucumber, chickpeas, and tomatoes.
Pour the lemony mayo dressing over the salad.
Toss gently until the salad is evenly coated.
Serve with crackers, pita chips, or cucumber slices.
Notes
Storing
Store in the Refrigerator - Place leftovers in an airtight container and refrigerate for up to 2 days.Store the Dressing Separately - For meal prep, keep the dressing in a separate container and mix it with the salad before serving.