Cut the smoked salmon and shrimp into bite-sized pieces.
Wash the salad greens (such as iceberg lettuce and arugula) thoroughly and remove excess water.
Slice cherry tomatoes in half and slice cucumber thinly.
Spread a little butter on sandwich bread, toast it in a pan, and let it cool.
Place salad greens, smoked salmon, boiled shrimp, cherry tomatoes, and cucumber on the bread.
Make a dressing with olive oil, lemon juice, and a pinch of black pepper, then drizzle evenly.
Finish by adding Parmesan cheese or herbs as desired.