Preheat oven to 350 degrees.
In a medium saucepan, combine chopped fruit and ¼ cup sugar. Heat on medium and stir to combine as juices form and sugar begins to melt. Cook for about 5 minutes until the fruit is soft.
Meanwhile, in a medium bowl, combine oats, butter, flour and ½ cup sugar and mix together with a fork until crumbly. Place half the mixture in an 8 inch square baking pan. Press the mixture into the pan, covering the whole bottom evenly to make a crust.
Add the filling, spreading it almost out to the edges.
Crumble the other half of the oat mixture over the top and sprinkle with the cinnamon.
Bake at 350 degrees for 45 minutes until golden and bubbling.
