01 - Preheat oven to 350°F (175°C). Lightly grease a 2-quart baking dish.
02 - In a large mixing bowl, gently toss strawberries with granulated sugar, cornstarch, lemon juice, and vanilla extract. Evenly spread the mixture in the prepared baking dish.
03 - In a separate bowl, combine oats, all-purpose flour, packed light brown sugar, salt, and ground cinnamon. Add cold butter and blend using a pastry cutter or fork until the mixture forms coarse crumbs.
04 - Distribute the crumb topping evenly over the strawberry mixture.
05 - Bake for 35 minutes until the topping turns golden brown and the filling bubbles at the edges.
06 - Allow crisp to cool for at least 15 minutes before serving. Best enjoyed warm, with vanilla ice cream or whipped cream if desired.