To make the crinkle base, preheat the oven to 350 °F. Melt the butter and take a brush, and put a thin layer of butter on the sheet pan. Unwrap the phyllo dough after it’s defrosted.
Take two pieces of phyllo dough and hold them horizontally. Use both hands to hold up the phyllo dough in front of you so that it’s hanging. Gently take your fingers and begin to fold or crinkle the phyllo dough from the top down like an accordion, so that you end up with a scrunched-up piece of phyllo dough. They should be about the height of the sheet pan.
Locate the shorter end of the sheet pan (aka the length of the sheet pan should match the length of the scrunched-up phyllo dough) and place the phyllo dough layer at the edge of the pan. Repeat scrunching the next two phyllo layers and butt it against the first scrunch of phyllo layers. Continue to add more layers until it’s full.
Place the sheet pan in the oven for ten minutes to get the phyllo dough crispy. Remove the pan and then add the melted butter over the layers of phyllo dough, sprinkle top of the sheets with sesame seeds and place the pan into the oven for another ten minutes.