I promise to show which crimper I’m using to make the above tarts. I personally find the plastic one better than the metal ones as it’s not as stiff so it’s easier to control the pressure when you crimp on it.
And for those who would like to do this design, here is a simple design to show how it is done.
Red refer to the 1st layer of crimping and Blue is the 2nd layer. So you actually crimp 8 times per tart!