Gourmet Mayonnaise
["1 egg", "1/2 tsp. dry mustard", "1 tsp. salt", "2 Tbsp. lemon juice", "1/4 c. salad oil", "3/4 c. sour cream"]
["Combine first 5 ingredients and beat thoroughly. Fold in sour cream."]
["egg", "dry mustard", "salt", "lemon juice", "salad oil", "sour cream"]