Bring milk, 125 ml water, butter and salt to the boil in a saucepan. Add flour and baking powder at once and stir in with a perforated spoon. Stir until the dough comes off the bottom of the pot as a lump. Take it off the stove. Put the dough into a bowl, stir in 1 egg and let the dough cool down a little. Then stir in 3 eggs one after the other until you have a smooth dough
Pour the dough into a piping bag with a large star-shaped spout (size 16-17). Spray a total of 8 large cream puffs onto 2 baking trays lined with baking paper. Bake in the preheated oven (electric cooker: 225 °C/ convection oven: 200 °C/ gas: see manufacturer) for 25-30 minutes one after the other. Remove from the oven, cut open immediately with small scissors and let cool off
Put 40 g of meringue in a freezer bag, crush finely with a dough roller. Whip cream until stiff, fold in meringue crumbs. Pour cream into a piping bag with a large star-shaped spout. Spread about 2/3 of the groats on the bottom of the cream puffs. Spray the cream on top in a spiral shape. Spread the rest of the groats over it. Roughly crumble the rest of the meringue and put the lid on. Dust with icing sugar. Tastes best fresh
Waiting time approx. 45 minutes