Spread the raspberries on a tray and let them thaw in the refrigerator. Beat eggs, salt and honey with the whisk of the hand mixer until thick and creamy. Gradually stir in flour and buttermilk.
Melt butter in an ovenproof pan (approx. 24 cm Ø). Pour in the dough. Bake in a preheated oven (electric cooker: 150 °C/ convection oven: 125 °C/ gas: level 1) for approx. 15 minutes, remove from oven.
Spread raspberries on the pancake. Sprinkle sugar over it. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 5 minutes. Serve immediately, decorated with mint.