Add all ingredients for the filling to a large bowl and stir to combine
Stir several times over the course of 5-10 minutes, or until sugar and cornstarch stick to the fruit
Add all ingredients for crisp topping to a bowl and use a spoon to combine. The mixture should resemble wet sand
Use a dish of choice and pour in the filling (I used a 9" pie pan)
Add crisp topping evenly over the fruit mixture
Bake at 350 degrees for 50-60 minutes, or until bubbly and crisp is browned
Serve hot with ice cream of choice
