Open sandwiches are very popular in Scandinavia. These sandwiches can be prepared with many different ingredients, but the procedure to make them is always the same. As for fillings and garnishes, these are only suggestions. There is no "right way" to combine fillings and garnishes.
Butter a slice of bread, and place a leaf of lettuce on the buttered bread. Top first with a hearty filling, and then garnish.
2-3 mackerel fillets, 2 tablesppons cooked shrimp, 1 slice of ham, 1 slice of roas beef, 2 slices of cheese.
Top mackerel with 1-2 egg slices, sprinkled with a little paprika, 1-2 green pepper strips, and 1 slice of lemon, twisted.
Top shrimp with 1-2 tomato wedges, 1 cucumber slice, twisted, 1 lemon slice, twisted - Optional: a little dot of mayonnaise over the tomato.
Top ham with 1-2 egg slices, 1 tomato wedge, 1-2 cucumber slices, twisted.
Top roast beef with tomato wedges and radish slices - Optional: thinly sliced onion.
Top cheese with tomato wedges, green pepper strips - Optional: thinly sliced onion.
Making open sandwiches is a good way to use up leftovers. You may use cold ham or beef from the evening before.
Iif you arrange the sliced ham or roast beef in a way that there is a fold in the middle, they will hold any garnish in place.
Use a variety of cheeses for mor appetizing sandwiches.
Garnishes can be prepared in advance and stored until you are ready to assemble the sandwiches. Used them in any kind of combinations and, if you have leftovers, they can go into a salad the following day.