Clean the rhubarb stalks and strawberries. Chop both of the fruits in thin slices or small cubes.
Preheat the oven on 180 degrees Celsius or 355 degrees Fahrenheit.
Baking
Add all the topping ingredients to the mixing bowl. Mix until all oats are covered with oil and honey. Personally, I love to add a pinch of salt too (to enhance the sweetness of the topping).
Put all the fruits in the skillet and top with the oat mixture.
Bake the crumble for about 30-40 minutes. When the oats are getting brown on top (halfway), I use a fork to mix the oats on top. This will not only make sure the topping bakes evenly, but also ensures crispiness of the topping.
Serving
Do you have a sweet tooth? Serve the crumble with some additional honey! I love ice cream so I topped the crumble with a few scoops of vanilla ice cream : )