I posted this in my trip report, but seeing an active post for mashed potatoes I thought I’d add my 2 cents.
I had this meal of country fried steak and mashed potatoes at the Rose Garden Restaurant in Silverpoint, TN. The steak & gravy were good, but the highlight of my meal was the mashed potatoes. With no gravy or butter on top, I had low expectations, but these were great. The potatoes were moist and had a slight tang, my wife said they must use buttermilk in them. We asked the waitress and she confirmed it was the buttermilk I was tasting. Best mashed potatoes ever! The Rose Garden is worth a stop just for them.