Banana Custard Cake

Ingredients

• 1/3 cup sugar
• 2 1/2 tbsp cornstarch
• 1 1/3 cup fresh / whole milk
• 1 tsp vanilla extract
• 2 eggs
• 3/4 cup + 2 tbsp all-purpose flour
• 1/4 salt
• 1 tsp baking powder
• 2 egg yolks
• 1/2 cup fresh / whole milk
• 1 large banana, mashed
• 4 egg whites
• 1/4 tsp cream of tartar