Firstly, Preheat the oven to 200 degrees celsius. Line a baking tray with baking paper.
To prepare the butternut squash, Cut the squash down the middle lengthways, scoop out the seeds, use a peeler to remove the skin (I find it easier to do it cut in half than whole!)
Slice the halves of the butternut squash very thinly to get semi circle strips. Continue until all is sliced.
Toss the sliced squash in the olive oil, chili flakes and a generous pinch of salt and pepper.
Place on the prepared baking tray, spread them out so not ontop of each other, place in the preheated oven for 5-10 minutes until soft and going brown around the edges. Remove from the oven and leave to cool and set aside.
In a bowl, mix together the ricotta with a generous pinch of salt and pepper.
Take out the ready to roll pastry, and lightly dust the worktop with flour, use a rolling pin to roll out the pastry into a 25cm square. At this point, move to a Baking tray lined with baking paper.
Mark a slightly smaller square leaving a 2cm edge. Using a fork, make holes in the pastry making sure not to cover the 2cm edge.
Arrange the sliced squash, onto of the ricotta in an overlaying pattern. Tear up some fresh sage leaves and place on top. drizzle with a little olive oil . Beat the egg in a small bowl and brush on the edge of the pastry.
Place in the oven preheated to 180 degrees celsius for 30-35 mins until the pastry is golden brown and crispy. Leave to cool slightly then cut up into pieces and enjoy!
Serve with a rocket salad for a light lunch or add potatoes or on the side of some soup for something more substantial!