1: 1. Choose high-quality canned tuna for maximum flavor and nutrition.

2: 2. Incorporate Greek yogurt for a creamy, protein-packed dressing.

3: 3. Add crunchy vegetables like carrots and cucumbers for extra freshness.

4: 4. Don't forget a sprinkle of fresh herbs like dill or parsley for added flavor.

5: 5. Opt for whole grain bread for a healthier option with added fiber.

6: 6. Experiment with different seasonings like lemon juice or mustard for a zesty kick.

7: 7. Swap out mayo for avocado for a creamy, nutrient-rich alternative.

8: 8. Consider adding a slice of avocado or hard-boiled egg for a boost of protein.

9: 9. Enjoy your tuna salad sandwich with a side of fruit for a balanced meal on the go.