Cake Roll with Custard Filling

Full Recipe:
Ingredients and Equipment Needed
Ingredients for the Cake
100 grams water (1/2 cup)
100 grams milk (1/2 cup)
A pinch of salt
A pinch of sugar
80 grams butter (4 tablespoons)
130 grams flour (7 tablespoons)
3 eggs
Ingredients for the Custard Filling
2 eggs
150 grams sugar (3/4 cup)
30 grams corn starch (3 tablespoons)
400 grams milk (2 cups)
1 teaspoon vanilla extract
50 grams butter (3 tablespoons)
Kitchen Equipment
Saucepan
Ezoic
Mixing bowls
Whisk
Spatula
Ezoic
Baking tray
Parchment paper
Plastic wrap
Ezoic
Step-by-Step Instructions