Preheat your oven to 190° C (375° F). And you will need a 2 ½ quart casserole dish. (I used a 7x11 baking dish and it worked perfectly.)
Trim the tops from the strawberries and cut out any cores, rinse them and rinse the blueberries and raspberries.
To a mixing bowl, add the Topping ingredients and mix together with a fork.
In a large bowl, mix together all the Fruit ingredients.
Add fruit to a casserole or 7x11 dish, and spread out evenly.
Sprinkle the Topping evenly over the fruit.
Place in the oven and bake for 35-40 minutes, the topping will be browned and the berries bubbly. Remove from the oven and place on a rack to cool off slightly. (I took the crisp out of the oven about 10 minutes before sitting down to dinner, and it was a perfect when ready to serve dessert.)
Serve with ice cream, enjoy!