2) For the filling: butter a 23 by 33cm casserole dish. In a large bowl mix all the filling ingredients together and toss to coat all the apples. Pour in the prepared baking dish.
3) For the topping: in a food processor combine the flour, brown sugar, cinnamon and salt. Pulse to blend. Pulse in the butter until mixture forms pea size lumps. Add the pecans and pulse 1 or 2 more times. Sprinkle over filling. Bake crisp for 45 to 50 mins. Cool 10 mins before serving.
4) For the bourbon cream: in a medium sized bowl, beat the cream until it begins to thicken. While beating, add the icing sugar and bourbon and beat until soft peaks form. Dollop over servings of apple crisp.