Can bad potato salad be made into something good? I was lazy the other day at the grocery store and bought potato salad from the deli instead of ingredients to make my own. That was a mistake. Now I have a big tub of bad potato salad.

It is apparent that the water used to boil the potatoes was under seasoned - severely underseasoned, perhaps not salted at all. The potatoes are slightly undercooked, and the dressing is bland.

I can't afford to be throwing away food, so I want to try to turn this potato salad into something I might actually eat. It doesn't need to continue to be potato salad; I'm open to ideas that might completely transform it into something else. Of course I would also be interested in ideas to turn bland, undercooked potato salad into good potato salad. 

A quick online search brought me to a recipe that is probably pretty close to what this was supposed to be (had it been prepared correctly): http://paleoleap.com/dill-potato-salad/. I'm pretty sure that the potatoes in my salad are russet, not Yukon Gold.
Microwave it (or bake in the normal oven in a casserole dish), add salt to taste, perhaps some butter or cream, weird mashed potatoes? Will depend rather on what, exactly is in this "deli potato salad" (which varies IME from potatoes and dressing to potatoes, many crunchy veggies, sometimes eggs, etc., etc. and dressing.) I've had quite decent versions that fit the former description, and some of the latter were terrible...

If the potatoes are adequately undercooked and you want some serious self-penance for buying it, you could possibly scrape the dressing off them and reboil to finish cooking, with salt, while adjusting the dressing (or pitching it, but mustard might save it if you like mustard, and garlic is always an option at my house.)