Go here for the recipe http://thepioneerwoman.com/cooking/2008/03/onion-strings-oh-yeah-baby/
Then I made this sauce that I got from the Food Network magazine. It is a copy of
Outback Steakhouse's Bloomin' Onion Dip
2 T mayo
2 T sour cream
1 1/2 tsp ketchup
1/2 tsp Worcestershire sauce
1 T horseradish sauce
1/4 tsp paprika
pinch of cayenne pepper, kosher salt & freshly ground black pepper