Wash the orange and boil in water for 1 hour and a half till soft.
Place the whole orange with the peel into a food processor/blender till smooth.
Pulse in the egg, honey, flour, salt and baking soda.
Line a cake tin with parchment paper and pour the batter in.
Preheat oven to 375F. Bake for 35-40 minutes (check with a skewer that it comes out clean).
Yoghurt Glaze: Mix the yoghurt and honey in a bowl. Drizzle over the cake. Decorate with more raspberries.
Orange Glaze: Place the orange juice and honey. Microwave for a few seconds to warm it up so that the honey will dissolve in (you can also do this on a small pan over the stove).