Bake 50 - 60 minutes, or until a wooden skewer inserted in the center comes out with just a few crumbs attached. Keep in mind that the gooey strawberries will stick to the skewer.
*For a more uniform and crackly topping like the one pictured, make the crumb layer with room temperature butter. For large, more distinct crumbs, use cold butter chopped into 1/4-inch pieces.