Lingkan Reang
Preheat oven to 180°C and line a square baking pan with parchment.
Mix flour, salt, baking powder, sugar, and butter to make crumbs.
Press half the crumb mix into the pan as the base.
Mix filling ingredients and spread over the base.
Top with remaining crumble and bake for 40-45 minutes.
Cool, slice, and serve.