Preheat oven to 400 degrees. Make the filling: Mix all ingredients to combine.
Make the topping: Combine all ingredients (except cream), rubbing in butter with your fingers until mixture is crumbly.
Divide filling among four 5 1/2-inch round baking dishes, and sprinkle with topping. Transfer to a baking sheet. Bake until bubbling and golden brown, 25 to 27 minutes. Let cool slightly. Drizzle with heavy cream if desired.