Preheat the oven to 80 °C (top and bottom heat). Grease two 25 x 10 cm box pans and line them with baking paper.
In a large bowl, dissolve the honey in 500 ml of boiling hot water. Add 500 ml of cold water and sprinkle the yeast. Set the bowl aside for 10 minutes.
Whip the yeast mixture with a whisk, then add both types of flour, salt and sunflower seeds and mix the ingredients with a large spoon until they have combined into an even, very loose, wet dough.
Pour half of the dough mixture into each of the prepared box moulds, spread evenly and smooth the surface. Sprinkle 2 tablespoons of pumpkin seeds over each, then cut the surface of the dough with a knife three to four times each time, so that the bread rises evenly during baking without tearing.
Bake the bread at 80 °C for 20 minutes, then raise the oven temperature to 210 °C and continue baking for 30-40 minutes. The breads are cooked when they sound hollow when you tap the bottom. Remove the still hot loaves from the pan and let them cool down.
They stay fresh for several days and taste very good even when toasted.