Turkish Kitchen - Béchamel dessert

 Recipe Ingredients:

- 130 grams of butter- 1 cup of flour (equivalent to 150 grams)- 1 liter of liquid milk- 1 teaspoon of vanilla- 1 cup of sugar

For the second layer:

- 2 and a half cups of water- 2 tablespoons of cornstarch- 1 cup of sugar

For decoration:

- Some ground pistachios