Quarter the red potatoes and place them in a large saucepan. Cover with cold water by about 2 inches.
Cook until tender:
Bring to a boil over medium-high heat, then reduce heat slightly and cook for about 15 minutes or until the potatoes are fork-tender.
Cool them down:
Drain the potatoes and rinse with cold water. Let them cool completely, about 1 hour, then transfer the potatoes to a large mixing bowl.
Add the mix-ins:
Stir in the crumbled bacon, chopped celery, and green onions until everything is evenly combined.
Make the dressing:
In a small bowl, whisk together the mayonnaise, pickle relish, vinegar, mustard, salt, and pepper until the dressing is smooth and combined.
Bring it all together:
Pour the dressing over the potato mixture and stir gently to coat everything without breaking up the potatoes.
Chill before serving:
Cover the bowl with plastic wrap and refrigerate for at least 1 hour to let the flavors meld.
Notes
Here are simple serving and storage tips. SERVE: As stated above, you don’t want to serve this potato salad immediately. Wait an hour for it to chill in the fridge. Potato salad is always tastier cold; those flavors set in if you wait a bit.STORE: Leftovers should go in the fridge. In an airtight container, they’ll stay fresh for 3 days.FREEZE: I don't recommend freezing this potato salad. Even without eggs, potato salad doesn’t thaw well due to the mayonnaise.