Ingredients

Unsalted butter 

2 slices white bread, toasted, or 1/2 small soft baguette, split horizontally 

2 hard-boiled eggs, peeled and sliced crosswise 

Coarse salt and freshly ground pepper 

1 or 2 sprigs watercress 

Preparation

Butter bread. Top 1 slice with eggs. Season with salt and pepper. Top with watercress and second slice of bread.