What you need for the filling:
a tablespoon of butter
For the crumble:
2 tablespoons of sugar
How you make it:
Step1: Preheat your oven to 200 degrees Celsius.
Step2: Remove the ''skin'' from the rhubarb and then chop the stems into small pieces.
Step3: smear butter on the inside of a baking dish and pour the coped up rhubarb pieces into the dish and make sure that it's a flat layer.
Step4: sprinkle 1dl sugar on top of the rhubarb.
Step5: Make the crumble. Just mix the butter, sugar, oats and flour together and just combine the ingredients with your hands, then just crumble it on top of the rhubarb.
Step6: serve it with vanilla sauce, ice cream or jus whipped cream.