01 -
In a mixing bowl, blend all-purpose flour, margarine, and granulated sugar until the mixture forms soft, uniform crumbs. Gently press the mixture into a greased 23 x 33 cm baking pan to create an even layer.
02 -
Bake in a preheated oven at 175°C for 10 minutes until set but not browned. Remove from the oven and allow to cool slightly.
03 -
Place the chopped rhubarb in a large heat-resistant bowl. Pour boiling water over the rhubarb and let sit for 10 minutes to soften. Drain thoroughly to remove excess liquid.
04 -
Evenly distribute the softened, drained rhubarb over the cooled base, making sure to cover the surface fully for balanced flavor.
05 -
In a separate bowl, whisk egg yolks, granulated sugar, and salt until smooth and slightly frothy. Gradually incorporate the milk and all-purpose flour, whisking continuously to achieve a lump-free batter.
06 -
Pour the prepared filling evenly over the rhubarb layer. Return the pan to the oven and bake at 175°C for 40 minutes, or until the filling is set and no longer jiggles at the center.
07 -
While the filling bakes, beat egg whites with cream of tartar until soft peaks form. Gradually add granulated sugar, continuing to beat until stiff, glossy peaks are achieved.
08 -
Gently spread the meringue over the baked filling, creating decorative peaks. Optionally, sprinkle with desiccated coconut. Bake at 175°C for 10 minutes, or until the meringue is lightly golden.
09 -
Remove from the oven and allow to cool completely in the pan for clean slicing. Once set, cut into portions and serve.