1: Upgrade your tuna salad with Greek yogurt for a creamy twist.

2: Add crunch to your sandwich with chopped celery and onions.

3: Incorporate avocado for a dose of healthy fats and creaminess.

4: Sprinkle in some fresh herbs like parsley or dill for extra flavor.

5: Swap mayo for mashed avocado for a healthier spread option.

6: Include whole grain bread for added fiber and nutrients.

7: Squeeze in some lemon juice for a burst of freshness.

8: Mix in some mustard for a tangy kick to your sandwich.

9: Experiment with adding different veggies like cucumbers or bell peppers.