1In a saucepan over medium heat, combine the peaches, sugar, water, cornstarch, cinnamon and vanilla.
Cook until the peaches thicken, approximately 10 minutes.
Add in the blueberries and cook for another 5 minutes.
In a mixing bowl, combine the oats, brown sugar, cinnamon, flour and salt. Add the cubed butter and cut the butter into the dry ingredients with a fork or pastry blender until crumbles form. ( or can be done in food processor) my favorite way.
Pour the fruit into a two quart baking dish.
Sprinkle the crumbles over the fruit.
Place the baking dish on top of a cookie sheet to help catch any drippings while baked. Place into a 350 degree F preheated oven for 30 minutes or until the topping is golden brown.
Serve warm or at room temperature with vanilla ice cream or whipped cream.