Prepare everything you need. Preheat the oven, as the dough for the charlotte needs to be baked immediately.
Peel the rhubarb stalks and cut them into pieces.
200 g rhubarb
In a bowl, add sugar, salt, and break the eggs.
5 pcs egg, 250 g sugar, 1 pinch salt
Beat with a mixer. The egg mixture should increase in volume, lighten in color, and become fluffy and airy. There will be traces left by the whisk, which immediately disappear. There is quite a lot of dough, so it will take at least 5 minutes to beat even at the highest power of the mixer.
Sift the flour and baking powder through a sieve.
250 g flour, ½ tsp baking powder
Mix with a spatula or mixer on the lowest speed. The dough should retain its light airy structure, flow from the whisk in a thick ribbon, leaving traces.
Add two-thirds of the chopped rhubarb to the dough and mix.
Put in a baking dish, grease only the bottom with vegetable oil. Here the diameter is 22 cm.
Sprinkle with pieces of rhubarb on top.
Bake in the oven at 170 ℃ for 35-40 minutes. The rhubarb pie will almost double in size. Pierce with a skewer, there should be no raw dough on it. Remove from the baking dish and cool on a wire rack. It can be served immediately. Optionally, sprinkle with powdered sugar.