Potato Salad

This was my grandmother's recipe. I like it because it isn't sweet or mushy like store bought potato salad.

6 potatoes, peeled
1/2 onion, diced
6 hard boiled eggs, diced
1 cup of real mayonnaise
a few splashes of apple cider vinegar
salt and pepper to taste

Boil potatoes until cooked but still firm. Drain water and return potatoes to pan. Splash with apple cider vinegar and let cool. Once cooled, drain off any excess vinegar and add onion, egg, mayonnaise and salt/pepper. Refrigerate until cold and serve.

Mike likes to add a bit of mustard to this but I like it the way it is.