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