This tip for using french fries for potato salad was found in a large collection of recipes collected by one cook. Date is unknown. The instructions are typed below along with a scanned copy.
Use for Potatoe Salad
Add french fries to water (cover 4 – 5 mins)
Drain and put on towel.
4 c. water boiling
1/2 tsp salt
Bring to boil, then turn off heat.
Add
1-16oz.–Frozen French Fries
Cover.