Preheat the oven to 375 and line a baking sheet with aluminum foil (to place your pie on and catch any syrup spills). Make pie crust or open your store-bought one and press into 9 inch pie plate.
In a large bowl, whisk together both sugars, flour, salt, cinnamon and ginger. Add melted butter and stir with a wooden spoon until it has come together.
In a separate bowl, toss the peaches with cornstarch and around 3/4 of the mixture you previously prepared. Pour into pie crust.
Crumble the rest of the mixture and place on top of the pie. Use it all (and maybe even some more if you want it extra crumbly!
Place the pie on baking sheet and bake for 40-50 minutes or until filling is bubbly and the top is golden brown.