Christmas Log Cake

This yr we celebrating Christmas in our house so I make a christmas log cake for celebration. Using my instructor of Creative Culinarie Judy Koh's recipe.

Swiss Roll Recipe:
(14x11 cake pan)
Ingredient A:
60g sugar
1/4 tsp salt
60g oil
5 egg yolks
75g water
Stir n mix all ingredient together till sugar melt.

Ingredient B:
100g cake flour
1 tsp baking powder
15g coco powder
1/4 tsp baking soda
Sift all ingredient n pour all in once to the yolk mixture

Ingredient C:
5 egg white
1/4 tsp cream of tartar
80g sugar
1) Whisk the white n cream of tartar till soft peak then add in sugar
2) whisk till stiff then use low speed to stablise
3) add some white mixture to yolk 1st n mix well
4) Then pour all into the white mixture
5) Fold gently till mix well
6) Pour into pan n bake at 200c for 10 to 15min