Boil a mixture of margarine, salt and water over a fire.
Remove the boiled mixture of margarine, salt and water from the stove. Add flour there and mix well until smooth. Place the pan on the stove and heat the dough. Remove the heated dough from the heat and cool.
Add the egg to the cooled dough and mix well. Add all the eggs one at a time, stirring the mixture each time until smooth. The dough should be thick and viscous.
Cover the baking tray with baking paper and place the dough there in the form of strips. Preheat the oven to 200 ℃, place the eclairs there and bake for about 15 minutes. Then reduce the oven temperature to 160 ℃ and let the eclairs dry for about 15 minutes.
Decorate the eclairs with melted dark chocolate and powdered sugar.