Pumpkin wash, clean, core, coarsely dice and distribute on a baking tray lined with baking paper. Cook in a preheated oven (electric cooker: 200 °C/ circulating air: 175 °C/ gas: see manufacturer) for approx. 30 minutes.
Remove, allow to cool and chop finely.
Whip the butter, sugar and salt with the whisk of the hand mixer until creamy. Stir in 5 tbsp. honey, pumpkin and eggs one after the other. Mix flour, baking powder and poppy seeds, except for a little bit for sprinkling.
Stir in yoghurt and flour mixture.
Put the dough into a greased and flour-spread box form (11 x 25 cm) and smooth it down. Bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 1 hour.
Remove, leave to rest in the mould for approx. 10 minutes, turn out of the mould and allow to cool. Mix icing sugar and 2 tablespoons of water. Spread the icing and the remaining honey on the cake. Sprinkle with poppy seeds.