For the choux pastry, put 1/4 litre water, butter and salt in a pot and bring to the boil. Remove from the heat, add the flour and stir with a wooden spoon until the mixture comes off the walls and a smooth dumpling is formed.
Stir the dough constantly over medium heat for 2-3 minutes until a coating has formed on the bottom of the pot. Pour dough into a bowl and stir for about 1/2 minute. Gradually add 4 eggs and continue stirring until a smooth and shiny dough is formed.
Pour the dough into a piping bag with star-shaped spout (1.3 cm Ø) and squirt dough fingers (approx. 10 x 2.5 cm) at a large distance from each other on three baking trays lined with baking paper. Mix the rest of the egg and 1 tablespoon of water and brush each piece of dough thinly with it.
Make sure that nothing drips down the sides. Bake in the preheated oven (electric oven: 200 °C/ gas: level 3) for 20-25 minutes. Take out and cut each eclair lengthwise on each side with a knife.
Turn off the oven and let the éclairs rest for another 5 minutes. Let them cool down on a cake rack. For the cream filling, place the egg yolks and 50 g sugar in a mixing bowl and beat with the whisks of the hand mixer until a creamy mixture is formed.
Add flour little by little and mix well. Put milk and remaining sugar in a pot. Cut the vanilla pod lengthwise and add. Heat the milk until the sugar has dissolved. Add 1/4 of the milk mass to the egg mixture and mix with the whisk of the hand mixer.
Pour the egg mixture into the remaining milk while stirring and boil for 3-4 minutes. Add butter and stir in. Remove the vanilla pod. Pour the mixture into a bowl and cover the surface with cling film so that no skin forms.
Let it cool down. Whip cream until stiff and fold into the cooled cream. Pour the vanilla cream into a piping bag with a star-shaped spout (1.3 cm Ø) and leave to cool completely in a cool place.
Melt the chocolate coating over a warm water bath. Spread each eclair with couverture. Leave to dry. Cut the eclairs in half lengthwise. Spray cream onto the lower halves of the dough and place the chocolate-covered halves on top.
Peel or clean, wash and chop the vegetables. Peel and finely chop onion and garlic. Wash thyme, shake dry, remove leaves. Bring 3-4 l salt water (1 teaspoon salt per litre) to the boil.