Toast the bread: Toast both slices of bread to a light golden brown.
Boil the eggs: Boil the eggs for about 10 minutes, then cool them down and peel off the shell.
Mash the eggs: Use a fork to mash both the yolk and albumen (egg white) together in a bowl.
Mix with mayonnaise: Add 2 tablespoons of mayonnaise to the mashed eggs and stir well until everything is evenly coated.
Season: Add a pinch of salt and black pepper to taste, stirring them in.
Optional add-ins: For added flavor and crunch, mix in diced cucumbers, or spread thinly sliced cucumbers on the bread before adding the egg mixture.
Assemble the sandwich: Spread the egg and mayonnaise mixture evenly on one slice of toasted bread. Optionally, top with a second slice of toasted bread.
Optional: Add tuna to the egg mixture.