Drain chicken thoroughly, break it up well and spread out over sheet pan lined with Parchment paper. Try not to overlap pieces.
Bake 10 mins then remove chicken from oven and transfer to a bowl to cool. Turn up oven to 500 degrees f.
Once cooled, break apart chicken with hands until it’s all shredded. Add egg and cheese and throughly mix together until it forms a ball. Place chicken “dough” on a piece of parchment and lay another piece on top. Using a rolling pin, roll out crust to desired shape. The thinner the better!
Remove top layer of parchment, transfer to sheet pan and bake in oven 10-12 mins or until lightly brown on bottom and edges. Remove from oven, spread a layer of sauce over top, sprinkle with dried oregano, more grated cheese and then mozzarella cheese. Return to oven, bake another 10-15 mins or until cheese is bubbly. Remove from oven, let cool and serve warm.