01 -
Preheat the oven to 175°C.
02 -
In a large mixing bowl, combine the diced rhubarb, granulated sugar, all-purpose flour, vanilla extract, and 60 ml melted butter. Mix thoroughly until all pieces are evenly coated.
03 -
Transfer the rhubarb mixture into a greased 22×22 cm baking dish and spread out evenly.
04 -
In a separate bowl, mix all-purpose flour, brown sugar, rolled oats, shredded sweetened coconut, and 120 ml melted butter. Stir until the mixture forms coarse crumbles.
05 -
Sprinkle the prepared topping uniformly over the rhubarb base.
06 -
Bake for 35–40 minutes, or until the surface is golden brown and the rhubarb is bubbling at the edges.
07 -
Remove from the oven and let cool for several minutes before serving.