1. Preheat oven to 210C (190C fan-forced). Grease and flour a muffin tray and set aside.
2. In a large bowl,sift together the flour,potato flour,sugar,baking powder and salt. Stir in the pepper and cheese,then set aside.
3. Combine the warm mashed potato,garlic and egg in a bowl,then stir in the milk,melted butter and herbs. Fold gently into the sifted dry ingredients until just combined. Spoon the mixture into the prepared muffin tray,filling each hole to three-quarters full.
4. Sprinkle the tops of each muffin with a little extra grated cheese and a pinch of nigella seeds,then bake in the oven for 20 to 25 minutes,or until a skewer inserted into the middle of a muffin comes out clean.
5. Cool for a few minutes before easing the muffins out of the tray. Serve warm or room temperature,with good salted butter.
If you like this recipe,try mychilli and cheese cornbread muffins
Find more of Helen Goh's recipes in theGood Food Favourite Recipes cookbook.