Strawberry Cream Slice

Ingredients

• For the crème pâtissière:
  1 unit
• egg yolks
  6 large
• Superfine sugar
  1/2 cup
• flour
  3 tablespoons
• milk
  1 cup
• heavy cream
  1 cup
• vanilla extract
  2 teaspoons
• For the spongecake:
  1 unit
• eggs
  3 large
• Nonstick vegetable oil spray or vegetable oil
  1 unit
• Superfine sugar
  3/8 cup
• vanilla extract
  1 teaspoon
• of salt
  1 Pinch
• baking powder
  1 teaspoon
• all-purpose flour
  1 cup
• For assembly:
  1 unit
• strawberries

  hulled and cut in two or four
  1 pound
• Superfine sugar
  1 teaspoon