01 - Preheat the oven to 350°F. Lightly grease a 2-quart baking dish to prevent sticking.
02 - In a large mixing bowl, gently toss the 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 oats, all-purpose flour, light brown sugar, salt, and ground cinnamon. Add the cold butter cubes and use a pastry cutter or fork to blend until the mixture resembles coarse crumbs.
04 - Evenly distribute the crisp topping over the strawberry layer in the baking dish.
05 - Bake for 35 minutes, or until the crisp topping is golden brown and the strawberry filling is bubbling around the edges.
06 - Allow the dessert to cool for at least 15 minutes before serving. Serve warm, optionally with vanilla ice cream or whipped cream.