source: The list of ingredients is from Mangia, a restaurant in Ottawa at Clarence and Dalhousie. The quantities are guesses.
This goes well with smoked salmon and cornbread.
Blend together:
1/2 cup mayonnaise
2 tbsp drained horseradish
2 tbsp finely chopped red onions
1 tbsp finely chopped capers
dash of Tabasco sauce