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I'd like to find someone in the area who is familiar with the
supermarket chain, Schnucks.

I was there on a brief trip recently and had the good fortune to sample
the 'Homestyle Mustard Potato Salad" sold in their deli.  It was the
market on Lindberg Blvd near Big Bend Blvd - we stayed at the Best
Western Kirkwood Inn --- I have obtained an ingredients list, (modified
food starch!) - bad for us!  What I would love, is to get the RECIPE so
I could modify it to CD standards and still enjoy the wonderful taste!!
Hoping for an angel out there!
TIA  Catherine