01 - Preheat oven to 350°F (175°C) and lightly grease a 2-quart baking dish.
02 - In a large mixing bowl, gently toss quartered strawberries with granulated sugar, cornstarch, lemon juice, and vanilla extract. Spread the mixture evenly into the prepared baking dish.
03 - In a separate bowl, combine rolled oats, all-purpose flour, brown sugar, salt, and ground cinnamon. Add cold cubed butter and blend with a pastry cutter or fingertips until the mixture forms coarse crumbs.
04 - Evenly distribute the crisp topping over the strawberry filling.
05 - Bake for 35 minutes, or until the topping is golden and the filling is bubbling around the edges.
06 - Allow the dessert to cool for a minimum of 15 minutes before serving. Best enjoyed warm, optionally with a scoop of vanilla ice cream or freshly whipped cream.