1: 1. Start with quality canned tuna for a protein-packed base.

2: 2. Mix in Greek yogurt for a creamy, healthier alternative to mayo.

3: 3. Add crunch with diced celery and red onion for texture.

4: 4. Spice it up with a touch of Dijon mustard for a flavorful kick.

5: 5. Layer on a whole grain bread for added fiber and nutrients.

6: 6. Don't forget to top with fresh avocado slices for added creaminess.

7: 7. Sprinkle with fresh herbs like dill or parsley for a burst of flavor.

8: 8. Serve with a side of mixed greens for a well-rounded meal.

9: 9. Enjoy your delicious and nutritious tuna salad sandwich for a satisfying breakfast on-the-go!