Place the eggs in a pot and cover with cold water. Bring the water to a boil, then reduce the heat to low and simmer for 10 minutes.
Remove the eggs from the pot and place them in a bowl of ice water. Let them cool for 5 minutes, then peel and cut them in half lengthwise.
Scoop out the yolks and place them in a bowl. Mash the yolks with a fork and add the mayonnaise, mustard, Parmesan, oregano, salt, and pepper. Stir until everything is combined and creamy.
Spoon the filling into the egg whites and sprinkle with paprika for garnish. Serve immediately.
Interesting Facts
Deviled eggs are a popular appetizer in many countries, including the United States, United Kingdom, Germany, and Australia.
The origin of the name "deviled eggs" is unknown, but it is thought to be related to the fact that spices such as mustard, cayenne, or paprika are often used to make the filling spicier.
Deviled eggs are traditionally served as a part of Easter celebrations in many countries.