01 - Preheat oven to 350°F (175°C). Lightly grease a 2-quart baking dish to prevent sticking.
02 - In a large mixing bowl, gently combine the strawberries, granulated sugar, cornstarch, lemon juice, and vanilla extract. Evenly spread the fruit mixture in the prepared baking dish.
03 - In a separate bowl, mix the rolled oats, flour, light brown sugar, salt, and ground cinnamon. Add cold butter cubes and blend with a pastry cutter or fork until the texture resembles coarse crumbs.
04 - Distribute the crisp topping evenly over the strawberry mixture. Bake for 35 minutes, or until the topping is golden and the fruit is bubbling around the edges.
05 - Remove from oven and cool for at least 15 minutes before serving. Serve warm, optionally with vanilla ice cream or whipped cream.