What's a food product from your grandparents' younger days that's still around which you like.
Fig Newtons 1891
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My wife's from eastern Tennessee. That's one of her favorite dinners, along with coleslaw.
Don't worry my father is. You'd be hard pressed to find someone more lost than my father trying to make something in the kitchen.
He used to make these now somewhat infamous slow cooker meals. He had this small slow cooker in his apartment and would go out to buy random assortments of produce that happened to be on sale, usually with a potato base or something like it. He'd then proceed to cook that all day long till they turned into bland mushy stews.
I'm glad I learned to cook from my mother 
I know my around the kitchen fairly well if I don't say so myself
Collard greens and black-eyed peas.
Hamhocks and beans.
Milk gravy.
Also, chicken fried steak, which I've never really liked.
All of the above were passed on to me by an ex-GIL, who taught me to garden and taught me to cook the things she'd grown up on.
To be honest, since my kids have grown, my last marriage ended, and I live alone, I don't cook things like those any more, and I rarely eat them. But thinking about them still makes me hungry. 
My adopted grandfather, whom I didn't know very well, sold stuff for them.
Otherwise known as Scrapple, or pork mush. The RAPA Scrapple plant began manufacturing it in 1926.
Best served for breakfast, sliced and fried in bacon grease w/maple syrup. A staple from my childhood.