Mom's Potato Salad

10 lbs potatoes, peeled and boiled in salt water
1-2 large onion, chopped
10 hard boiled eggs, diced

Dressing:
1 jar Miracle Whip
1 can evaporated milk
1-2 tsp mustard
1-2 tsp sugar
1 tsp salt

Cook potatoes and eggs and let cool completely before dicing. Combine potatoes, onion, and eggs. In a separate bowl mix dressing ingredients and pour over potatoes. Stir gently to coat. Best if let set a few hours or overnight to let the dressing be absorbed and the flavors mingle. Taste before serving and adjust seasonings and liquids to taste.