Shrimp with Fried Onion Dip Sauce

White wine, sour cream and caramelized onions do indeed make a fabulous dip.  They also make a delicious pasta sauce.  I recently joined a Facebook group that has resolved to cook and bake from the wonderful cookbook, The New Midwestern Table by Amy Thielen.  Our noble leader asked Amy for permission that was kindly granted.  The first recipe chosen was for a great fried onion dip that