Tuna Salad Lettuce Boats

Let me tell you something about tuna salad. Most of the time, it’s drowning in mayo and served on sad, squishy bread. That’s fine if you’re into that. But this? This is different.

These Tuna Salad Lettuce Boats are fresh, crunchy, and surprisingly addictive. Tuna packed in olive oil (you use half the oil from the can no mayo needed). Tomato puree for richness and tang. Finely chopped red onion for bite. And the secret weapon Granny Smith apple. Crisp, tart, sweet little cubes that cut through the richness of the tuna and add a pop of freshness.

Then you spoon it all into crisp lettuce leaves and fold them into little boats. Eat with your hands. No bread. No fork required.

Ten minutes. No cooking. Gluten free. Low carb. High protein. And so good you’ll forget mayo ever existed.

Let’s make some lettuce boats.

Try my Curry Chicken Lettuce Wraps recipe.

Why You’ll Love the Recipe

1. No mayo. Just tuna in olive oil + tomato puree. That’s the “dressing.”
2. Granny Smith apple. Tart, crisp, sweet. Game changer.
3. Red onion adds bite. Finely chopped so it’s not overpowering.
4. 8 lettuce boats. Perfect for a light lunch or appetizer.
5. 10 minutes start to finish. Faster than ordering takeout.
6. No cooking. No stove. No oven. No heat.
7. Gluten free + low carb + high protein. Fits almost every diet.
8. Eat with your hands. Fun, messy, delicious.

Try my Tuna-Mayo Lettuce Wraps recipe.

What You’ll Need to Make

You’ll need a can opener, a cutting board, a sharp knife, a mixing bowl, a spoon, and a serving plate.

Ingredients (Serves 2):

• 10 oz. (280g) tuna in olive oil, drained (reserve half the oil)
• 1 tbsp. tomato puree (not tomato sauce puree/concentrate)
• 1 small red onion, finely chopped
• ½ Granny Smith apple (green apple)
• 8 lettuce leaves (romaine, butter, or iceberg work best)

Try my Air Fryer Korean Pork Lettuce Wraps recipe.

What You’ll Need to Do

Time – 10 minutes

Alright, let’s make tuna salad that doesn’t need mayo and doesn’t need bread.

First, open your tuna. Drain the olive oil from the can into a small bowl. You’ll use about half of it. Save the rest for another use (salad dressing, roasting veggies).

Add the tuna to a mixing bowl. Flake it with a fork.

Add the tomato puree and half of the reserved olive oil from the can. Mix well. The tomato puree adds richness and a subtle tang. No mayo needed.

Finely chop the red onion. You want small pieces, not big chunks. Add to the bowl.

Now for the apple. Halve the Granny Smith apple. Remove the core. Chop it into very small cubes about the same size as the onion. Add to the bowl.

Mix everything thoroughly. Taste it. Need more salt? The tuna is usually salty enough, but adjust if needed.

Wash and dry your lettuce leaves. Romaine, butter lettuce, or iceberg all work. You want leaves that are sturdy enough to hold the filling.

Spoon the tuna mixture evenly among the 8 lettuce leaves. About 2 tablespoons per leaf.

Fold or wrap the leaves to enclose the filling. Like a little boat. Or a taco. Whatever you want to call it.

Serve immediately. These don’t sit well the lettuce gets soggy.

Eat with your hands. That’s the whole point.

Try my Chinese Pork Lettuce Wraps recipe.

Easy Ingredient Swaps

1| No tuna in olive oil? Use tuna in water. Add 1 tbsp olive oil separately.

2| No tomato puree? Use ½ tbsp tomato paste mixed with ½ tbsp water. Or skip it different flavor but still good.

3| No red onion? Use shallot or finely chopped white onion.

4| No Granny Smith apple? Use any crisp, tart apple (Pink Lady, Honeycrisp). Or use 2 tbsp chopped cucumber for crunch.

5| No lettuce? Use endive leaves, cabbage leaves, or serve in bell pepper halves.

6| Add crunch: Add 2 tbsp chopped celery or water chestnuts.

7| Add herbs: Add fresh dill, parsley, or chives.

Try my Bulgogi Beef Lettuce Wraps recipe.

Some Twist and Tweak Ideas

1| Spicy version: Add ½ tsp red pepper flakes or a dash of hot sauce.

2| Mediterranean version: Add chopped olives, sun-dried tomatoes, and fresh oregano.

3| Curry version: Add ½ tsp curry powder and 1 tbsp raisins (not low carb).

4| Dill pickle version: Add 2 tbsp chopped dill pickles and 1 tsp pickle juice.

5| Caper version: Add 1 tbsp capers (rinsed). Briny, salty, delicious.

6| Avocado version: Add ¼ diced avocado to the mixture. Creamy and rich.

7| Wrap it: Skip the lettuce. Wrap in a low-carb tortilla.

Try my Slow Cooker Pulled Pork Lettuce Wraps recipe.

Some Helpful Tips

1| Use tuna packed in olive oil. It’s more flavorful and gives you the oil you need for the “dressing.” Tuna in water works but add 1 tbsp olive oil separately.

2| Don’t drain all the oil. You need about half of it. The tomato puree and oil create a creamy, mayo-like texture.

3| Chop the onion and apple finely. Big chunks overwhelm the delicate tuna. Small pieces = every bite has a little of everything.

4| Use crisp lettuce. Romaine, butter lettuce, or iceberg. Avoid soft leafy greens like spinach they’ll wilt and tear.

5| Serve immediately. Lettuce boats are best fresh. The lettuce gets soggy within an hour.

6| Pat the lettuce leaves dry. Excess water will make the filling slide off.

Try my Simply Delicious Keto Pork Fajita Lettuce Wrap recipe.

Some Budget-Friendly Tips

1| Canned tuna is cheap. Buy it on sale. Stock up. It lasts forever.

2| Tomato puree is pennies. A small can costs almost nothing. Use the rest for sauces or soups.

3| Red onions are cheap. One small onion costs pennies. Use the rest for salads or sandwiches.

4| Granny Smith apples are affordable. One apple gives you two servings (½ per serving). Eat the other half as a snack.

5| Lettuce is cheap. A head of romaine or iceberg costs a few dollars. Use the rest for salads all week.

6| Make a double batch. Twice the tuna boats. Same 10 minutes. Eat for days.

Try my Keto Cheeseburger Lettuce Wrap recipe.

Some Serving Ideas

• As a light lunch. 4 lettuce boats per person. Filling but not heavy.
• As an appetizer. Smaller portions. Pass around a platter at a party.
• For meal prep. Make the tuna mixture ahead. Store in the fridge. Spoon into fresh lettuce leaves when ready to eat.
• In a lunchbox. Pack the tuna mixture in a container. Pack lettuce leaves separately. Assemble at work.
• With soup. Serve alongside tomato soup or vegetable soup.
• On crackers. Skip the lettuce. Serve the tuna mixture on gluten-free crackers.

Some Storage and Reheating Tips

This recipe is best fresh. But here’s how to make it work.

Fridge (tuna mixture only): Store the tuna mixture in an airtight container for up to 3 days. Do not add to lettuce until ready to eat.

Fridge (assembled boats): Not recommended. The lettuce will be soggy within an hour.

Freezer: Do not freeze. Tuna texture becomes weird. Lettuce becomes mush.

Reheating: Do not reheat. This is a cold dish. Warm tuna salad is not the vibe.

Meal prep strategy: Make the tuna mixture. Store in the fridge. Wash and dry lettuce leaves. Store separately in a container with a paper towel to absorb moisture. Assemble boats fresh when ready to eat. Takes 2 minutes.

Final Thoughts

Look, I love a classic tuna sandwich. But sometimes when I want something lighter, crunchier, and without the bread I make these Tuna Salad Lettuce Boats.

No mayo. Just tuna in olive oil mixed with tomato puree, finely chopped red onion, and crisp Granny Smith apple. Spooned into sturdy lettuce leaves. Folded into little boats. Eaten with your hands.

Ten minutes. No cooking. Gluten free. Low carb. 38g of protein.

Make it for lunch. Make it for a party appetizer. Make it for when you have a can of tuna and no idea what to do with it.

However you serve it, you’re getting a fresh, crunchy, protein-packed meal that’ll make you forget mayo ever existed.

Now go chop an apple.

~ Danny Davis

P.S. If you try the dill pickle version, let me know. That’s my go-to when I want a classic deli vibe without the bread. So good.