Chocolate Swiss Roll

Chocolate Swiss Roll Ingredients: 6 Medium Size Egg Yolks 60 grams Milk 60 grams Oil 1 Teaspoon Vanilla Essence 1/2 Tespoon Salt 120 grams Plain Flour 6 Medium Size Egg Whites 1 Teaspoon White Vinegar 120 grams Fine Sugar Pan size: 37cm x 24cm Baking temperature: 120°C for 20 minutes, then 150°C for 8 minutes