Plum Crumble

For the Crumble Top:
1 cup all purpose flour
1/2 cup oat flour
1 cup rolled oats
3/4 cup brown sugar
1 teaspoon cinnamon
1/4 teaspoon nutmeg
1/4 teaspoon sea salt
10 tablespoons unsalted butter, melted

For the fruit:
1/2 cup sugar
2 tablespoons cornstarch
1 teaspoon orange zest
9-10 plums, thinly sliced (yielding 6 cups)
1/2 teaspoon vanilla

Preheat the oven to 350°F.

Make crisp topping first: Mix the flour, oats, brown sugar, cinnamon, and salt together in a medium bowl. Pour in the melted butter and work it into the dry ingredients with your hands until the crumble topping begins to clump together and all of the ingredients are incorporated.

Make the fruit filling: combine the sugar, cornstarch, plums, orange zest and vanilla in a bowl. With a rubber spatula, gently fold ingredients together until well combined.

Spread the fruit evenly across a 9-inch square baking pan (we like Pyrex) and sprinkle crisp topping generously on top. Place the dish onto a sheet pan (to catch juices) and bake until juices are bubbling and top is crisp, about 50 minutes.