Teresa's Deviled Eggs

1 dozen eggs

½ cup mayo

1 tablespoon mustard  

1 teaspoon vinegar

Put eggs in a pot and cover with enough water to cover.  Add a tablespoon of salt to the water.  Bring to a boil.  Reduce heat and cook for 10 minutes.  Drain water and peel the eggs.  Cut each egg in half and put filling in a bowl.  Add the mayo, mustard, vinegar, salt and pepper to the filling and mix.  Fill each half of egg with filling.  Cover and refrigerate.