Ube Chiffon cake

Ube cake batter:
Ube Chiffon cake
5 L size egg yolks
30 grams granulated sugar
100 grams ube jam /ube halaya
70 ml milk
50 ml vegetable oil
2 tsp ube extract
100 grams cake flour / all-purpose flour
1 tsp baking powder
a pinch of salt
Meringue:
5 egg whites
80 grams granulated sugar
1 tsp lemon juice / 1/2 tsp cream of tartar
Oven Temperature:
160℃　Electric Oven
140℃　Gas oven
Bake for 50~55 minutes