Rus...they were local "fresh" hashbrowns...I don't remember who our produce vendor was but thats who we got them from. The Oil was just the standard butter flavored oil that Denny's used for eggs and most everything, it came from the Denny's warehouse. The potatoes didn't really clump up if I recall correctly..we kept them pretty well oiled.
And then to finish we loaded them on to the hot part of the flat grill, oiled if needed, cooked until brown+ and then flipped over and finished them.
Gregeats...We "had to" pre-cook them just to keep up with the demand and because we use both flat tops to make pancakes during the rush. They would actually be 4 - 6 inches thick on the grill, and one of the nine line cooks would baby sit them to keep them turned and oiled. Man, they came in before during and after drinking...Never work a full moon night, on the strip, at an all night coffee shop
This was an unusual Denny's to say the least....where a standard store had a 6 burner egg station, 6' flat grill, and a 3' chargrill, we had two of everything in a mirrored configuration, and about a 200 seat side dining room. Also, we were next door to a 1000 room motel (Westward Ho) with no food service at the time...and...we had guys on hotcart adult tricyles doing room service. To say this place rocked is an understatement. It was so busy that we (the 5 managers)seldom had to correct an employee...if you couldn't pull your weight in your position...the other crew members would convince you to leave. Sad to say its long gone now, the motel put in food service, the lease on the grounds expired, and McD opened up next door where the old Phillps gas station was located.