Tuna Salad Lettuce Wraps
I used to order tuna subs on white bread and feel virtuous about it. I was making a ‘healthy’ protein choice. I was, it turned out, making my healthy protein sit in a bath of mayonnaise on top of a portion of refined flour. My body was less enthusiastic about this framing than I was.
The lettuce wrap swap is the one that gets the most sceptical looks from people who haven’t tried it. It seems like a deprivation. It isn’t — the romaine leaves are crisp and fresh, and the tuna in Greek yogurt is genuinely creamy in a way that’s different from but completely as good as mayonnaise. And I don’t hit the 3pm wall anymore.
Use a no-added-sugar Dijon mustard. Many mustards contain sugar — check the label. The Dijon adds a tang that replaces some of the work the bread was doing flavour-wise, and it makes the whole thing taste properly dressed rather than underdone.
*Per USDA FoodData Central
The Swap Snapshot
| Typical Version | The Sugar Swap Version | Sugar per serving* |
|---|---|---|
| Tuna Sub on White Bread White bread, mayonnaise — both contribute sugar and refined carbs |
Tuna Salad in Lettuce Wraps Canned tuna, plain Greek yogurt, celery, Dijon mustard, romaine lettuce |
12g→2g |
*Based on USDA FoodData Central values. The Sugar Swap is not medical or nutritional advice.
Ingredients
Serves 1 · Scale as needed
- 1 can (160g) tuna, drained
- 2 tbsp ⇄ plain Greek yogurt ⇄ the mayo swap
- 1 tbsp celery, finely diced
- 1 tsp ⇄ Dijon mustard (no added sugar) ⇄ the flavthe swap
- 4 large ⇄ romaine or butter lettuce leaves ⇄ the bread swap
- squeeze fresh lemon juice
- pinch black pepper
Instructions
-
1
In a bowl, combine the drained tuna, Greek yogurt, diced celery, Dijon mustard, lemon juice, and pepper. Mix well.
⇄ Swap NoteGreek yogurt provides the creaminess of mayonnaise with far less sugar and more protein. If it’s too thick, add another squeeze of lemon.
-
2
Spoon the tuna salad into the centre of each lettuce leaf.
-
3
Fold and eat immediately — these don’t wait well.
Why I Made This Swap
A standard tuna sub on white bread contributes 10–12g of sugar from the bread (which contains added sugar) and mayonnaise (which often does too). Swapping to plain Greek yogurt and crisp lettuce leaves removes virtually all of the added sugar while significantly increasing the protein content and eliminating the refined flour. The result is a lunch that keeps blood sugar stable and keeps you full far longer.
Common Mistakes
- Using sweetened or flavoured mustard. Many mustards contain added sugar — Dijon is the safest but still check the label. The mustard provides a key flavour note that makes the filling feel complete.
- Using light or low-fat Greek yogurt. Full-fat gives the creamiest, most satisfying result. Light versions can be watery and won’t bind the tuna as well.
- Assembling too far ahead. Lettuce wraps go limp once filled. Mix the tuna ahead but fill and eat immediately.
Storage
The tuna salad mixture keeps in the fridge for up to 2 days in a sealed container. Assemble the wraps just before eating to keep the lettuce crisp.
Nutrition per serving
*Per USDA FoodData Central · Typical version: 12g sugar · The Sugar Swap is not medical or nutritional advice.
Frequently Asked Questions
Can I use salmon instead of tuna?
Canned salmon works beautifully — it has a richer flavour and higher omega-3 content. Use the same amounts.
What if I want it spicy?
A dash of Tabasco or sriracha — check the label for any without added sugar. The heat works brilliantly against the creamy yogurt base.
Can I add avocado?
Yes — diced avocado is a lovely addition. It adds healthy fat and makes the wraps even more filling. Add it at the last minute to prevent browning.
