Grab a baking dish (my dish is 11" x 9"). Peel, core and chop the apples into small chunks and place them in the base of the baking dish. I haven't greased my baking dish, but you can if you want to.
Next, add the rolled oats, sugar and spices to a large mixing bowl and stir until well combined. Add the chopped pecans now if you're using them.
Then add the sourdough starter and softened butter and mix through until it forms a stiff mixture. You may need to get in there with your hands if your butter isn't soft enough - that's ok!
Take your sourdough apple crisp topping and place it on top of the apples. Use your fingers to press the mixture all over the apples, essentially sealing them into the bottom of the dish.
Bake the sourdough apple crisp at 200C for around 45 minutes or until the topping is golden and crispy.
Allow to sit for around 10 minutes before serving so that the apples cool a little. Serve with vanilla ice cream, whipped cream or custard.
