I offer a recipe for a very mild horseradish dressing from a very popular local restaurant here in KC (whose recipe book cover quaintly says "Receipts"--near drove me nuts as a kid).
I whip up a big batch of this when I slow roast a brisket.
1/2 c whipping cream
1/4 c mayonnaise
2 Tb salad mustard (I use prepared, not dry)
1 heaping Tb horseradish
1/2 tsp lemon juice
1/2 tsp Worcestershire sauce
1/4 tsp seasoned salt
1/8 tsp each salt and pepper
Beat cream until stiff. Fold in rest of ingredients. Chill.