Preheat your oven to 350℉ Line an 8 inch round pan with parchment paper or grease it.
Rinse and dry your orange. Remove any exterior stems and then quarter it. Remove any seeds. You are using the WHOLE ORANGE here - peel and all.
Add the ingredients to your blender or food processor in the order listed above. Blend till smooth and then pour the batter into your pan. Bake for 50 minutes to an hour or until top of cake is golden. Remove from oven and allow to set in the pan for 15 minutes then transfer to a wire rack to fully cool.
Optional Icing:
Whisk together the ingredients till smooth. Drizzle on cake when fully cooled.
Notes
Nutritional Info is for the cake ONLY.You can use 1 3/4 cups regular all purpose flour or gluten free flour here instead of the oats.Any neutral oil works here or melted butter.You can use sour cream for the Greek yogurt.You can use honey or agave to replace the maple syrup. You can also use granular sugar too.