Preheat your oven to 350°F (175°C).
In a large bowl, combine sliced strawberries and chopped rhubarb.
Add granulated sugar, flour, and lemon juice to the fruit mixture; stir until well combined.
Transfer the fruit mixture to a greased 9x13 inch baking dish.
In a separate bowl, mix rolled oats, brown sugar, melted butter, cinnamon, and salt.
Spread the oat mixture evenly over the fruit in the baking dish.
Bake for 35-40 minutes or until the topping is golden brown and the fruit is bubbly.
Remove from the oven and let cool for at least 10 minutes before serving.
Serve warm, optionally topped with vanilla ice cream.
Enjoy your delicious strawberry rhubarb crisp!