Plum Crumble

Instructions

1. Prepare the plums
   Wash the plums thoroughly. Cut them in half, remove the pits, and quarter them. Place the plum pieces in a large mixing bowl.
2. Season the fruit
   Add granulated sugar, lemon juice, vanilla extract, cornstarch, and 1/4 teaspoon cinnamon to the plums. Toss gently until the plums are evenly coated. Transfer the mixture to a 9x13 inch baking dish, spreading it out evenly.
3. Prepare the crumble topping
   In a medium bowl, combine flour, rolled oats, brown sugar, 1/2 teaspoon cinnamon, nutmeg, and salt. Mix well with a fork or whisk to combine.
4. Add butter to the topping
   Add the cold cubed butter to the dry mixture. Using your fingers or a pastry cutter, work the butter into the dry ingredients until the mixture resembles coarse crumbs with some pea-sized pieces of butter remaining.
5. Assemble the crumble
   Sprinkle the crumble mixture evenly over the plum filling, covering the fruit completely. Press down lightly to compact the topping slightly.
6. Bake the crumble
   Preheat your oven to 375°F (190°C). Place the baking dish on a sheet pan (to catch any bubbling juices) and bake for 35-40 minutes, until the topping is golden brown and the fruit filling is bubbling around the edges.
7. Cool and serve
   Remove from the oven and let cool for 15-20 minutes before serving. This allows the filling to set slightly. Serve warm with vanilla ice cream or whipped cream if desired.