Healthy Tuna Salad Sandwich in 10 Minutes

Ingredients

• 2 cans (142 g each; 5 oz each)Chunk light tuna in water, thoroughly drained
• 60 ml (¼ cup)Plain Greek yoghurt, non-fat or 2%
• 30 ml (2 tbsp)Mayonnaise
• 15 ml (1 tbsp)Fresh lemon juice
• 5 ml (1 tsp)Dijon mustard
• 50 g (¼ cup)Celery, finely diced
• 20 g (2 tbsp)Red onion, minced
• 4 g (1 tbsp)Fresh parsley, chopped
• 1.5 g (¼ tsp)Salt
• 1 g (¼ tsp)Black pepper
• 8 slices (approximately 200 g)Whole grain or sprouted bread
• 4 large leaves (60 g)Romaine or butter lettuce
• 1 medium (120 g)Tomato, thinly sliced

Instructions

1. 1

   Drain the tuna

   Drain the tuna over the sink, pressing the lid firmly against it to squeeze out excess water. Transfer it to a mixing bowl and use a fork to break the chunks into small, even flakes.

2. 2

   Mix the dressing

   In a small bowl, or directly in the tuna bowl, combine the Greek yoghurt, mayonnaise, lemon juice and Dijon mustard. Stir until smooth and pale.

3. 3

   Add vegetables

   Add the celery, red onion and parsley to the tuna mixture. Fold gently until the vegetables are evenly distributed, then season with the salt and black pepper.

4. 4

   Toast the bread

   Toast the bread slices until golden brown.

5. 5

   Assemble sandwiches

   Put a lettuce leaf on each bottom slice of toast to help shield the bread from moisture. Spoon the tuna filling onto the lettuce, add tomato slices and top with the remaining bread.

What is a tuna salad sandwich?

Tuna salad sandwiches are a familiar American lunch, made by mixing canned tuna with a creamy dressing and serving it between slices of bread. This version pairs Greek yoghurt with a smaller amount of mayonnaise for a tangy, smooth filling.

Celery, red onion and parsley add crunch and freshness, while lettuce and tomato complete the sandwich. The ingredients are simply mixed and assembled, so there is no cooking beyond toasting the bread.

Nutrition and macros by portion

The nutrition label shows one serving as written: 275 calories, 27g protein, 24g carbs, 8g fat.

The tuna provides most of the protein, while the bread contributes most of the carbohydrates. Mayonnaise and yoghurt supply much of the fat, with smaller amounts from the tuna and bread; serve the sandwich with salad or extra vegetables for a balanced plate.

Choosing the tuna and dressing

Tuna: Chunk light tuna in water gives the filling its main savoury flavour and protein. Drain it thoroughly so excess water does not loosen the dressing.

Dressing: Greek yoghurt, mayonnaise, lemon juice and Dijon mustard make a creamy, lightly sharp mixture. Non-fat or 2% yoghurt both work as specified in the recipe.

Keep the filling textured

Vegetables: Finely diced celery and minced red onion spread through the mixture without creating oversized bites. Fold them in gently to keep some texture in the tuna rather than turning it into a paste.

Seasoning: Parsley brings a fresh herbal note, while salt and black pepper round out the flavour. Taste and adjust only after mixing, since the tuna and mayonnaise may already be seasoned.

Toast and assemble

Toast: Aim for golden-brown slices that can support the filling. Toasting also gives the sandwich a crisp contrast to the creamy tuna.

Layer: Place lettuce directly on the bottom toast before adding tuna and tomato. The lettuce helps keep moisture from the filling and sliced tomato from soaking into the bread.

What to serve alongside

For a simple lunch, serve the sandwich with a green salad or crunchy vegetable sticks. A bowl of soup also makes a warming partner, especially when you want a more substantial meal.

Make-ahead timing

The tuna filling can be mixed ahead and kept chilled until you are ready to eat. Toast and assemble the sandwiches just before serving so the bread stays crisp.

Recipe notes & tips

• Press the can lid against the tuna to remove as much water as possible.
• Flake the tuna evenly so the dressing coats it throughout.
• Dice the celery finely for crunch without large pieces.
• Toast the bread shortly before assembling for the best texture.
• Keep the lettuce between the toast and filling to help protect the bread.

Variations

• Add cucumber: Mix in finely diced cucumber for extra crunch.
• Use chives: Replace the parsley with chopped chives for a mild onion flavour.
• Make it sharper: Add a little extra lemon juice to the dressing.
• Try seeded bread: Use seeded wholegrain slices for a different texture.
• Add extra greens: Tuck a few baby spinach leaves into each sandwich.

Common mistakes to avoid

• Wet tuna: Drain and press it thoroughly so the filling does not become watery.
• Large onion pieces: Mince the onion finely for a more even flavour in each bite.
• Overmixing: Fold gently to keep some texture in the tuna.
• Soggy bread: Toast the slices and place lettuce between the bread and filling.
• Assembling too early: Add the filling and tomato shortly before serving to preserve the toast's crispness.

How to store

Store leftover tuna filling in an airtight container in the fridge and use within 2 days. Keep the bread and filling separate, then toast and assemble when ready to eat; assembled sandwiches are best eaten straight away.

Frequently asked questions