Step 1: Boil the Eggs Perfectly

1. Place the eggs in a single layer in a saucepan and cover them with water.
2. Bring the water to a boil over medium-high heat.
3. Once boiling, remove the pan from heat, cover it, and let the eggs sit for 10-12 minutes.
4. Transfer the eggs to an ice water bath and let them cool for at least 5 minutes.

Step 2: Peel and Cut the Eggs

1. Gently tap each egg on a hard surface to crack the shell.
2. Roll the egg between your hands to loosen the shell, then peel it off carefully.
3. Slice each egg in half lengthwise and remove the yolks.

Step 3: Prepare the Creamy Filling

1. Place the yolks in a bowl and mash them with a fork until smooth.
2. Add mayonnaise, mustard, vinegar, salt, pepper, and optional ingredients like garlic powder or relish.
3. Mix until creamy and well combined. Adjust seasoning if needed.

Step 4: Fill the Egg Whites

1. Spoon or pipe the yolk mixture back into the egg white halves.
2. Use a piping bag for a professional look or a spoon for a rustic style.

Step 5: Garnish and Serve

1. Sprinkle smoked paprika over the eggs for a classic touch.
2. Add chopped chives or parsley for freshness.
3. Serve immediately or refrigerate for up to 2 days.