01 -
Preheat your oven to 350°F (175°C).
02 -
In a bowl, combine plain flour, oats, brown sugar, kosher salt, and softened butter. Mix until crumbly.
03 -
Take half of the prepared crust mixture and press it firmly into an ungreased 9” x 9” baking pan to form the base layer.
04 -
In the bowl of a stand mixer, beat cream cheese, white sugar, and egg until smooth. Stir in vanilla essence, ground cinnamon, and ground nutmeg.
05 -
Gently fold the diced rhubarb into the cream cheese mixture. Spread this filling over the pressed crust layer in the pan. Sprinkle the remaining crust mixture evenly over the filling to create a crumble topping.
06 -
Bake in the oven for approximately 40 minutes, until the topping is lightly browned and the filling is set. Remove from the oven and cool completely on a cooling rack before serving.