01 - Preheat oven to 350°F. Lightly grease a 2-quart baking dish.
02 - Gently toss strawberries with granulated sugar, cornstarch, lemon juice, and vanilla extract in a large mixing bowl. Evenly spread the mixture 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 butter cubes and blend with a pastry cutter or fork until the mixture forms coarse, crumbly texture.
04 - Sprinkle the crisp topping evenly over the strawberry mixture.
05 - Bake for 35 minutes until the topping is golden brown and the strawberry base begins to bubble.
06 - Allow to cool for at least 15 minutes before serving. Enjoy warm, optionally with vanilla ice cream or whipped cream.