How to Make It
Preheat the oven to 325°. In a large bowl, mix the oats with the flour, walnuts, almonds, cinnamon, nutmeg and salt.
In a small bowl, whisk the oil with the honey and vanilla; drizzle over the crumb topping and mix until well coated.
Spread the crumble on a baking sheet in an even layer. Bake in the center of the oven for 25 to 30 minutes, stirring occasionally, until the crumble is golden brown. Transfer to a rack and let cool completely to crisp up, about 1 hour. Spoon the crumble over roasted or poached fruit or yogurt.