- Preheat oven to 350ºF and lightly grease a 9-inch pie pan with ½ teaspoon of vegetable oil. Combine ingredients for panko crumble topping in a medium mixing bowl and stir to combine. Set aside.
- Combine berries, flour and sugar in a separate medium mixing bowl and stir to coat berries.
- Pour berries into the prepared pan and sprinkle panko crumble evenly on top. Bake for 40-45 minutes, until berries are bubbling, and panko is golden brown.
- Cool berry crumble at room temperature for 10 minutes. Serve with vanilla ice cream on top.