How to make Colm O'Gorman's festive apple and cranberry pecan crumble

I love fresh cranberries. I love how tart and yet sweet they are, how beautifully they work in both sweet and savoury dishes. They are wonderfully versatile. I am always thrilled to see them arrive in the supermarkets, and I buy kilos of them, making lots of cranberry sauce, desserts, muffins and more. I also freeze a few punnets so that I have some to hand out of season.
This crumble recipe pairs cranberries with apples, topped with a lightly spiced pecan crumb. It is a beautiful festive dessert, perfect for a holiday lunch or supper if you have a gang to feed. It is quite quick to prepare, and if you wish, you can even prepare it in advance and then pop it in the oven to bake thirty minutes before you need to serve it. Make sure to use cooking apples for this recipe.