Preheat the oven to 400°F.
Place the fruit in a mixing bowl. Add the sugar, cinnamon, salt, cornstarch, and almond extract. Stir to combine and then let the fruit rest on the counter while preparing the crust.
In a separate mixing bowl, stir together the flour, oats, and brown sugar.
Add the melted butter and stir to combine.
Press half of this mixture into a well-buttered or parchment-lined 9x13 pan.
Pour the fruit over the bottom crust and then sprinkle the rest of the dry mixture on top.
Bake for 30-35 minutes, until the crust turns golden brown.
Serve warm from the oven or let cool completely and slice into servings.