Take a bag of frozen hash browns (1 lb., or 16 oz. size) and add them to a pot of boiling, salted water. Let them cook for around 5 minutes, then test for doneness. Done? Drain the potatoes.
Let them cool. Combine with your potato salad faves. On Memorial Day 2012, we had:
mayo - couple of big spoon spoonfuls (say, 1/3 cup)
dijon mustard - 1 Tablespoon
salt
pepper
This stuff stirred together and then combined with the potatoes. Let this set while you chop and do other stuff, say 20 to 30 minutes.