1. Cut the hard-boiled eggs in half length-wise. Scoop or pop the yolk out of the center of the eggs and place all the eggs in a small mixing bowl.
2. Mash the yolk with a fork until the yolk is the texture of small pebbles. Add the Greek yogurt, mayonnaise, sea salt, mustard, and onion powder to the yolk. Mix in until the mixture is smooth and combined.
3. Scoop or pipe the yolk mixture back into the center of the egg whites. Sprinkle the deviled eggs with paprika to serve. Serve the eggs immediately or chill them in an airtight container up to 2 days before serving.