Recipe for making a sandwich similar to the egg salad sandwich from Starbucks.

Put the eggs in a pot, cover them with cold water, and heat until boiling.
Put a lid on the pan and switch off the stove. Wait for 8 minutes.
Put the pan under cold water to stop the cooking process.
Peel the eggs, cut them into small pieces, and put them in a bowl.
Put mayonnaise, mustard, chopped chives, salt, and pepper.
Stir gently.
If the mix is too dry, add a bit more mayonnaise little by little.
Put arugula on the bread and divide the mixture evenly between the two sandwiches. Source: allrecipes.com