540 calories for a 6 inch with no condiments or cheese. The result was delicious and healthier than traditional tuna & mayo sandwiches! I came up with this concoction one day when I was craving eggs and tuna and hand no mayo. Dana Shultz, author of Everyday Cooking, also says you can use 2-3 tablespoons of additional tahini in place of the mayonnaise. So, in order to create the consistency desired to hold the tuna together I decided to add the yolk of a sunny-side up egg. Make it ahead. If you are not vegan, Greek yogurt or mayonnaise or a combination of the two work well. I have also tried this recipe with my brother and his buds agreed! That's pretty steep for something people might mistake as low calorie or healthy. As noted above, to keep this vegan, use vegan mayonnaise. Visit CalorieKing to see calorie count and … Dressing. There are 323 calories in 1 Tuna Sandwich. No-Tuna “Tuna” Salad Notes. You'd need to walk 102 minutes to burn 365 calories. Get full nutrition facts and other common serving sizes of Tuna Sandwich including 1 oz and 100 g. There are 365 calories in 1 small (7.5 oz) of Jerry's Subs & Pizzas Tuna Sub, without mayo. Oh, and I looked into a subway tuna sandwich to see if it was relatively healthy.