Deviled Eggs with vinegar

6 hard-boiled eggs , peeled and sliced in half,lengthwise 1/4 cup mayonnaise 1 teaspoon vinegar 3/4 teaspoon prepared mustard 1/8 teaspoon salt 1 dash white[...]

6 hard-cooked eggs, cooled 1/2 teaspoon dry mustard or 1 teaspoon prepared mustard 1 dash pepper 3 tablespoons mayonnaise , salad dressing or 3 tablespoons[...]