Classic Egg and Cress Sandwiches

Name: Classic Egg and Cress Sandwiches
Prep time: 15 min
Total time: 15 min
Yield: 4 porties
Cuisine: Belgian
Ingredients: water; medium eggs; spring onions; mayonnaise; Dijon mustard; ground cayenne pepper; fine sea salt; ground black pepper; wholemeal bread; cress