Preheat oven to 350 degrees Fahrenheit. Spray a 9x13 or 8x11 baking dish with nonstick cooking spray and set aside.
In a medium bowl, mix together the flour, sugar, salt, and melted butter for the crust. The mixture will be the consistency of wet sand. Press about ⅔ of the mixture into the prepared baking dish. I use the bottom of a measuring cup to make sure it's flat, even, and completely pressed down. Set aside.
In the same bowl, whisk together eggs, cream, brown sugar, cinnamon, vanilla extract, and flour until very smooth. Fold in the strawberries and rhubarb.
Pour the mixture over the prepared crust.
Crumble the remaining crust topping over the top.
Bake for 30-35 minutes until the topping begins to turn golden brown and the center is set. I find that a 9x13 pan takes 30 minutes and an 8x11 or 8x12 pan takes closer to 35 minutes.
Let bars cool completely before slicing and serving.
Enjoy!
Recipe by For the Love of Gourmet at https://fortheloveofgourmet.com/strawberry-rhubarb-crumble-bars/