In a large bowl add the chopped eggs, mayonnaise, dijon, chives, dill, salt, and pepper. Tip: I love using this egg slicer to make chopping the eggs a lot faster.
Then use a spoon to mix everything together.
Now spread a little bit of softened butter on each (inside part) of the bread and add split the egg salad mixture on to 2 slices of bread.
Then top the other 2 buttered pieces of bread and enjoy.
Notes
Don't overboil the eggs- Be careful of overcooking the eggs, which can make them chalky rather than creamy. Don't boil them for more than 10 minutes.
Chop the eggs into small pieces- I like to use an egg slicer for this because it chops them more quickly and evenly than doing it by hand.
Use fresh herbs- Fresh herbs have better flavor than their dried counterparts, as well as adding nice texture. Use fresh if you can.
Soften the butter- If you're using soft sandwich bread, softened butter will spread more easily and evenly, as well as avoid tearing the bread as cold butter would.