Instructions

  1. Slice eggs in half lengthwise; remove yolks and set whites aside.
  2. In a small bowl, mash yolks with a fork.
  3. Stir in the mayonnaise, vinegar, butter, sugar, pepper, and salt.
  4. Add spinach and mix well.
  5. Stir in the bacon; spoon into egg whites.
  6. Serve immediately.