In a small bowl, combine the chopped hard-boiled eggs, Greek yogurt, and Dijon mustard. Gently mash with a fork to your desired consistency.
Stir in the paprika, salt, and pepper until well combined.
Gently fold in the shredded lettuce and finely chopped tomato.
Spoon half of the egg salad mixture into each pita pocket half or spread evenly between two slices of bread to create your sandwich.
Serve immediately or store in the refrigerator for later.
Add a pinch of curry powder or a tablespoon of finely chopped fresh dill for an extra layer of flavor.
Stir in 1 tablespoon (15 ml / 0.5 fl oz) of finely diced celery or red onion for a delightful crunch.