Fill a pot with cold water and gently place the eggs inside. The water should be covering the eggs. Cover the pot and bring the water to a boil on medium heat. Turn off the heat and let the eggs sit in hot water for 10 minutes.
Fill a bowl with ice cubes and cold water. With the help of a pair of tongs put the eggs immediately inside the bowl to stop their cooking process. Let sit for 2-3 minutes until they have cooled slightly. Tap each on the coutertop and peel off their shells.
Slice the egg in the middle and chop into bite-sized pieces. Do not dice very finely. Put the chopped eggs in a medium bowl.
To that bowl add the salt, black pepper, crushed red pepper, chives, dill, mayonnaise and Dijon mustard. Fold gently with a spatula to avoid mashing the eggs.
Toast the bread and spread some butter. Top it with a handful of lettuce, sliced tomato and egg salad mixture. Put another toasted bread and enjoy!
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Notes
Fresh herbs are key to flavour in this recipe. I do not recommend skipping them. But if you like you can substitute with ½ teaspoon dried dill or similar quantity of fresh parsley.
Chives can be substituted with the green part of spring onion.