Buttery Raspberry Crumble Bars

1. Preheat the oven to 350 degrees F. Line a 9x13 inch baking dish with parchment paper.2. In the bowl of a food processor, pulse together the oats, flour, brown sugar, baking powder and cinnamon, until the oats are mostly ground. Add the cold butter pulse until a crumbly dough forms. If the dough seems dry, add 1 tablespoon water.3. Press 1/3 of the dough into the bottom of the prepared baking dish. Transfer to the oven and bake 10 minutes or until lightly golden.4. Meanwhile, make the filling. In a medium bowl, toss the raspberries with the sugar, flour, vanilla, and lemon zest. Spoon the berries out into an even layer over the pre-baked crust. Dollop the raspberry jam evenly over the berries. Add the peach slices in a single layer. Sprinkle the remaining crumble dough overtop the berries. Return to the oven and bake for 30-40 minutes or until the crumble is a light golden brown and the berries burst. 5. Let cool completely before cutting into bars. Keep stored in a sealed container for up to 1 week.