Strawberries and blueberries combine with a crunchy oat topping.
Preheat oven to 375°F and grease a square 9 x 9 inch pan. Rinse all fruit, dice strawberries, and place in a medium bowl. You should have 5 cups of fruit. Add lemon juice and zest, toss.
In a small bowl mix the sugar, flour and cinnamon and add it to the berries. Toss until combined. Pour into the prepared pan.
In a food processor, combine the topping ingredients. Pulse until butter is mixed in. Sprinkle topping over the berries. Bake in the oven for 30-35 minutes. Serve warm with ice cream or whip cream.