Horseradish Mayonnaise

Ingredients

100ml grape-seed oil.
50ml olive oil.
30g fresh, horseradish, finely grated
1 tsp hot English mustard.
1 egg yolk.
Tarragon vinegar.
Worcestershire sauce.
Paprika.

Method

Whisk egg yolk and mustard in a large bowl.
Combine oils, then gradually add oil mixture to egg yolk, whisking constantly to emulsify.
Whisk through horseradish.
Season well with Worcestershire sauce, paprika, pepper and tarragon vinegar.