Deviled Eggs - cooking recipe

Ingredients

12 hard-cooked eggs
2 tsp. vinegar
3/4 tsp. salt
1/8 tsp. pepper
1 tsp. mustard
2 Tbsp. melted butter
3 Tbsp. mayonnaise

Preparation

Slice eggs lengthwise.
Remove yolks and mash until lumps are gone.
Add other ingredients and mix well.
Spoon into egg whites. Sprinkle with paprika.