Preheat oven to 375F.
In a medium bowl, combine the pastry crust ingredients and mix gently with a spoon or spatula until crust just comes together, about 30 seconds. If dough isn't sticking together and seems dry, add in more ice water 1 tbsp at a time.
Turn dough out onto a parchment or baking mat lined baking sheet and knead once or twice so that the the ball of dough is mostly sticking together. Take care not to knead more than a few times as you could overwork the dough. If it isn't sticking together 100%, that's ok. It'll come together when you roll it out.
Roll the dough out directly on the lined baking sheet until it is a couple millimetres thick and the dough is a bit bigger than the size of a dinner plate.
To prepare the filling, core and slice the pears about 1 centimetre thick.
Lay the pear slices in the centre of the pastry leaving about a 10 centimetre edge around the pastry. The pear slices can overlap to fit them all in the middle of the pastry dough.
Sprinkle the pears with the ginger, cinnamon and raw sugar.
Fold the edges of the pastry overtop of the pear filling, leaving the centre uncovered. The look we are going for is nice and rustic.
Using a pastry brush, brush the heavy cream over the top of the pastry and sprinkle with raw sugar.
Plate the galette in the oven and bake for about 35-45 minutes, or until it is golden brown.
Let the galette cool almost completely.
To make the whipped cream, combine the heavy cream and the sugar in a medium bowl. Using a handheld mixer, whip until firm peaks form, about 5 minutes.
Serve the galette sliced with dollops of whipped cream.