1Preheat your oven to 180°C (350°F).
Peel, core, and dice the apples and pears into small cubes. Place them in a medium baking dish.
Sprinkle the diced fruit with ground cinnamon and saffron threads. Toss gently to combine and evenly distribute the spices.
In a mixing bowl, combine the rolled oats, all-purpose flour, brown sugar, and chopped pistachios.
Add the unsalted butter (cold and diced) to the oat mixture. Use your fingertips to rub the butter into the dry ingredients until the mixture resembles coarse crumbs.
Evenly spread the crumble mixture over the fruit in the baking dish.
Bake in the preheated oven for 30–35 minutes, or until the topping is golden brown and the fruit is bubbling.
Remove from the oven and let cool for a few minutes before serving. Enjoy warm, optionally with a scoop of vanilla ice cream or a dollop of whipped cream.