Step by step recipe:

1. 5 min.
   Peel 1 red onion and slice thinly into rounds.
   
   Slice 1 tomato (I'm using a green variety here).
   
   Prepare the lettuce leaves.
2. 2 min.
   Melt 30 g butter in a frying pan on medium heat.
   
   Tear 1 buckwheat pancake into pieces and fry until golden brown.
3. 5 min.
   Wjen nicely browned, salt lightly and set aside.
   
   Mix 100 g crab meat with 50 g Mayonnaise and the chopped 1 tablespoon herbs of your choice.
4. 
   Lay a slice of toast on the worktop.
5. 
   Spread a layer of crab mayonnaise with herbs, then add a slice of tomato and a few onion rings.
6. 
   Add some lettuce and pieces of fried buckwheat pancake.
7. 
   Top with a second piece of toast.
8. 10 min.
   Make all the sandwiches like this.
   
   These sandwiches are traditionally served cut into triangles and held one on top of the other with toothpicks.