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1. Choose quality canned tuna packed in water for a lean protein boost.
2. Add crunch with chopped celery and red onions for texture and flavor.
3. Mix mayo, mustard, and lemon juice for a zesty dressing.
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4. Opt for whole grain bread for added fiber to keep you full.
5. Include a handful of fresh spinach for a dose of vitamins and minerals.
6. Sprinkle dried herbs like dill or parsley for an extra burst of flavor.
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7. Don't forget a slice of ripe tomato for sweetness and juiciness.
8. Top with avocado slices for a creamy and healthy fat addition.
9. Enjoy your tuna salad sandwich with a side of fresh fruit for a balanced meal.