Home Made Hokkaido Lemon Chiffon Cupcake

6 egg whites
80 g caster sugar
1 tbsp lemon juice
-------------------
6 egg yolks
40 g caster sugar
120 g fresh milk
70 g vegetable oil
140 g cake flour
--------------------
1 cup whipping cream
1/2 cup powdered sugar
1 tsp vanilla extract
2 tbsp lemon juice
lemon peels (for garnish)