Tuna & Avocado Sandwich

This Tuna & Avocado Sandwich is creamy, fresh, and full of flavor — the perfect healthy lunch or quick snack. Flaky tuna is mixed into a simple filling, then layered with ripe avocado slices, crisp lettuce, and juicy tomatoes, all tucked between soft bread of your choice. Packed with protein and healthy fats, this tuna sandwich is not only delicious but also nutritious, keeping you satisfied for hours.

I make these tuna sandwiches on repeat alongside my classic chicken sandwiches because they’re so easy to prep ahead and ideal for busy weekdays, school lunchboxes, or even a light dinner. Minimal prep, maximum flavor — that’s why this recipe is a family favorite.

Ingredients for Tuna & Avocado Sandwich

Making this sandwich is simple and flexible — you only need a few pantry staples and fresh produce. Here’s what goes in:

• Bread – Whole-grain, rye, or sourdough are my favorites, but any soft fresh bread will work.
• Canned Tuna – Use good quality tuna packed in brine or spring water for the cleanest flavor.
• Mayonnaise – Whole egg mayonnaise gives the creamiest, most balanced taste.
• Chilli Sauce – A touch of chilli sauce adds subtle heat; swap with ketchup for a milder flavor.
• Gherkins – Chopped gherkins bring crunch and tang that balance the creaminess.
• Jalapeños – Optional, but great if you like a little extra spice.
• Lettuce – Crisp cos lettuce works perfectly, though iceberg or romaine are also good options.
• Onion – Spanish onions are mild and slightly sweet, making them ideal for sandwiches.
• Tomatoes – Choose firm, ripe red tomatoes for freshness and juiciness.
• Avocados – Perfectly ripe avocados add creaminess and healthy fats, making this sandwich filling and nutritious.
• Seasoning – A little salt and freshly cracked black pepper ties it all together.

How to Make Tuna & Avocado Sandwich

Prepare the Tuna Mix

Drain the canned tuna well to remove any excess liquid.

Finely chop the onion, gherkins, and jalapeños.

In a mixing bowl, combine the tuna with the chopped veggies, mayonnaise, and chilli sauce. Season with salt and freshly cracked black pepper. Taste and adjust to your preference.

Assemble the Sandwich

Spread a generous layer of the tuna mixture over one slice of bread.

Add fresh tomato slices, creamy avocado, and crisp lettuce leaves on top.

Place the second slice of bread over and gently press down.

Slice in half and serve immediately for the best texture and flavour.

Watch How to make Tuna & Avocado Sandwich

Tips & Variations For Tuna Sandwich

• Skip the bread: Enjoy the creamy tuna filling with crackers or crispbread. For a low-carb option, use large lettuce leaves to wrap the filling.
• Add extra crunch: Mix in spring onions, celery, or sweet corn for more texture. Fresh herbs like dill or parsley also pair beautifully with tuna.
• Drain tuna well: Make sure to drain the tuna thoroughly; excess liquid can make the sandwich soggy.
• Make ahead: The tuna mixture can be stored in an airtight container in the fridge for 2–3 days, ready to assemble whenever you need a quick meal.
• Prevent soggy bread: If assembling ahead of time, place a lettuce leaf on both slices of bread before adding the filling — it acts as a barrier and keeps the bread fresh.

Other Sandwiches to Try:

Classic Chicken Sandwiches

Chicken Tikka Panini

Spicy Chicken Sliders

Ground Chicken Burger