01 -
Preheat oven to 175°C and line a 23×33 cm baking pan with parchment or lightly grease.
02 -
Combine flour, oats, and brown sugar in a bowl. Pour in the melted butter and mix until crumbly. Press mixture firmly into the prepared pan and bake for 15 minutes.
03 -
In a saucepan over medium heat, combine chopped rhubarb, granulated sugar, and cornstarch. Stir continuously and cook until mixture thickens, about 7–10 minutes. Remove from heat and stir in vanilla extract.
04 -
Spread the thickened rhubarb filling evenly over the pre-baked crust. Return to oven and bake for an additional 10–15 minutes until the filling is set.
05 -
Using a mixer, beat cream cheese, powdered sugar, and vanilla extract until completely smooth and creamy.
06 -
Allow baked layers to cool completely. Gently spread cream cheese mixture over the cooled base. Refrigerate for at least 2 hours or until fully set.
07 -
Cut into squares using a cleaned knife for neat edges. Serve chilled.