Avocado Tuna Salad Sandwich

Our Avocado Tuna Salad Sandwich is the perfect way to get a serving of seafood this week. Protein-packed canned tuna is mixed with a creamy mayo–Greek yogurt combo, with a touch of tang from Dijon mustard and the brightness of lemon. We added crunch and texture with antioxidant-rich red onion, salty dill pickles and crisp celery—a must-have vegetable in tuna salad. We topped this delicious salad with avocado, lettuce, tomato and sandwiched it in whole-wheat bread for a perfect lunchtime meal you’ll want to make again and again. Keep reading for our expert tips on preparation, smart protein substitutions and make-ahead suggestions. 

Tips from the EatingWell Test Kitchen

These are the key tips we learned while developing and testing this recipe in our Test Kitchen to make sure it works, tastes great and is good for you too! 

• Thoroughly mixing the tuna salad ingredients helps to incorporate the flavors and ensures there are no large chunks of tuna. 
• As this tuna salad sits in the refrigerator, the flavors intensify, which guarantees delicious leftovers. 
• Serve this recipe in lettuce wraps for a low-carb option.
• Swapping the tuna for canned chicken would be delicious too.

Nutrition Notes

• Canned tuna is a budget-friendly and convenient high-protein source. Getting more protein at each meal can help with satiety and controlling blood sugar levels. Tuna is also a source of selenium, which is an antioxidant that has been linked to a reduced risk of prostate cancer and may potentially reduce the risk of heart disease. 
• Greek yogurt is a great addition to reduce the amount of mayo in this tuna salad. Using it helps cut back on saturated fat. Greek yogurt is high in protein and calcium, essential nutrients to maintain muscle and bone health. If you choose a yogurt with live and active cultures, you’ll get a probiotic benefit, and that bacteria will help aid in the health of your microbiome. 
• Avocados contain heart-healthy fats that can help you lower cholesterol and assist in blood sugar control. They are a good source of folate, which is essential for healthy pregnancy outcomes. Adding avocado slices also gives the sandwich a creamy texture and ties in all the flavors of the salad and toppings while adding richness. This way, you can use less mayonnaise.
• Whole-wheat bread is always a healthy choice for sandwich bread, especially when you want to keep raising the nutrition of this recipe. Always look for the “whole” in whole-wheat bread to ensure you get all the fiber and B vitamins you’d expect by making this choice.