In a bowl, mix together rhubarb, strawberries, sugar, lemon juice, vanilla, and cornstarch. Pour into a 9X13 inch baking dish.
In a bowl mix together all of the crumble ingredients and mix together with your hands.
Pour crumble mixture over the strawberries and rhubarb, making sure to cover all off the baking dish. You can either keep it loose or compact it down. Place baking dish into the oven for 1 hour.
Remove crumble and allow to cool slightly or fully depending on how you like to eat it! Serve it with a scoop of vanilla ice cream and enjoy.
Enjoy!
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