Gourmet Mustard
["1 (4 oz.) can dry mustard", "1 c. tarragon vinegar", "6 whole eggs", "3/4 c. sugar", "1 stick butter", "1 tsp. salt"]
["Whisk eggs in, one at a time; whisk thoroughly. Then add sugar, butter and salt. Keep stirring, about 5 minutes. Do not overcook or eggs will curdle."]
["mustard", "tarragon vinegar", "eggs", "sugar", "butter", "salt"]