01 -
Preheat oven to 175°C. Ensure the rack is centered.
02 -
In a medium bowl, combine flour, oats, brown sugar, and salt. Blend in softened butter using a pastry blender or fingertips until the mixture forms coarse, pea-sized crumbs.
03 -
Firmly press half of the crumb mixture into the base of an ungreased 23x23 cm baking pan to create an even layer. Reserve remaining mixture for the topping.
04 -
In a separate bowl, beat softened cream cheese, granulated sugar, and egg together until smooth. Add vanilla extract, cinnamon, and nutmeg; mix until fully incorporated. Gently fold in chopped rhubarb.
05 -
Spread cream cheese and rhubarb filling evenly over the prepared crust. Sprinkle reserved crumb mixture evenly over the filling.
06 -
Bake for 40 minutes, or until the topping is golden brown and set.
07 -
Allow bars to cool completely in the pan on a wire rack. Once cooled, cut into squares for serving.