Ingredients
Method
1.In a small saucepan, combine vinegar, tarragon and peppercorns. Heat on medium, simmering 1-2 minutes, until reduced by half. Strain.
2.In a large heatproof bowl, combine egg-yolks and strained vinegar.
3.Place over a saucepan of simmering water. Whisk vigorously 1-2 minutes, until thick and creamy.
4.Remove from heat. Gradually add oil in a thin steady stream, whisking to combine (if sauce becomes too thick, slowly whisk in a tablespoon warm water). Mix in extra chopped tarragon if using, season to taste.
5.Serve sauce with steak, fries and salad, or with poached eggs on muffins with smoked salmon.