Steps
- Mash 145g of canned water-packed tuna, drained, ½ peeled finely diced celery stalk, ½ small finely diced red onion, and 1 tablespoon of mayonnaise. Season with a little salt and plenty of pepper.
- Spread the filling over two of 4 multigrain bread slices. Top with 8 cucumber slices and 4 washed dried Little Gem lettuce leaves.
- Spread the remaining bread with 2 teaspoons of mayonnaise, close the sandwiches, and press lightly. Cut in half.