In in your mixing bowl with a dough hook add yeast, sugar and warm milk (about 40 seconds in the microwave to get it to 110 degrees), let sit for 10 mins.
then add the butter, salt and 2 C flour and mix until the dough comes together and starts to clean the sides - add more flour if needed just 2 Tbsp at a time, don't add too much flour - you'll end up with tough dough.
Place the dough in a lightly oiled bowl and flip to coat both sides, then cover and let rise until doubled in size, about an hour.
punch down and divide into four equal balls.
Roll each ball out to 10-12 inches and use a plate cut circles.
spread the 1/3rd of the pesto onto a circle then 1/3rd of the cheese, repeat leaving the 4th final circle blank
place a 2 inch cutter or glass in the center of the circle - this is to mark where your NOT going to cut. cut the circle into 16 wedges
twist every two wedges the opposite direction then pinch together - repeat around
let rise 15 mins
preheat oven to 400
brush with the beaten egg, sprinkle on salt if desired