Grease baking dish or cast-iron skillet.
Preheat oven to 350°
Combine fruit, vanilla, orange zest, salt, tapioca (or flour) in a large bowl. If using frozen fruit, increase tapioca or flour by 1 tablespoon.
Toss to evenly coat.
In a second medium bowl, add topping ingredients and mix with a fork until clumps form.
Pour the fruit mixture into a baking dish and sprinkle evenly with topping.
Bake 20 - 30 minutes until the fruit is bubbly and the topping is golden brown.