01 - Preheat oven to 350°F. Lightly grease a 2-quart baking dish to prevent sticking.
02 - In a large mixing bowl, gently mix strawberries with granulated sugar, cornstarch, lemon juice, and vanilla extract until evenly coated. Spread the mixture evenly in the prepared baking dish.
03 - In a separate bowl, combine rolled oats, all-purpose flour, light brown sugar, salt, and ground cinnamon. Add cold cubed butter and blend using a pastry cutter or fork until the mixture forms coarse crumbs.
04 - Evenly distribute the crisp topping over the strawberry filling. Bake for 35 minutes, or until the top is golden brown and the fruit juices are bubbling.
05 - Allow to cool for at least 15 minutes before serving. Serve warm, optionally topped with vanilla ice cream or whipped cream.