Egg salad is good on it's own, served over lettuce, or in a sandwich. You can also customize with additional ingredients, such as:
Chopped ham
Chopped celery
Diced onions: red, green, yellow, or white
Paprika
A pinch of cayenne pepper or a dash of hot sauce for a bit of kick
Ingredients:

4 piece hard cooked eggs, chopped
½ cup mayonnaise
1 teaspoon salt
2 teaspoons Dijon mustard
Dash freshly ground pepper
1 tbsp chopped dill

Procedure:

Step 1 In small bowl combine eggs, mayonnaise, mustard, dill, and pepper.

Step 2 Cover and chill.