Method
Preheat the oven to 375°F (190°C) and grease a 9-inch baking dish lightly with butter.
Toss strawberries and rhubarb with granulated sugar, cornstarch, lemon juice, and vanilla in a bowl until coated and juicy.
Mix rolled oats, flour, brown sugar, cinnamon, and salt in a separate bowl.
Add cold cubed butter to the dry topping and cut it in with a pastry cutter or fork until you get pea-sized crumbs.
Pour the fruit mixture into the baking dish and spread evenly.
Scatter the topping evenly over the fruit, pressing lightly in a few spots so crumbs stick.
Place the baking dish on a sheet pan and bake for 35–45 minutes, or until the topping looks golden brown and the fruit mixture bubbles at the edges.
Let the crisp cool for at least 10 minutes before serving.
Nutrition info is automatically calculated as an estimate — actual values may vary. Always check your ingredient labels for the most accurate results!
Notes
Serve warm with ice cream or Greek yogurt for a delightful treat.