Wash the oranges with the peel. Grate away 1 teaspoon of the peel and safe for later.
Peel and cut the oranges in thin slices, place in a casserole. Add water so it covers the peel and bring it to boil. Lower the heat and cook for 5 minutes. Pour away the water and let them cool down
In a casserole pour the orange juice and 100 gr sugar and stir while it becomes like syrup. Take away from the stow.
Mix the eggs and 80 gr of sugar to a white foam.
Mix the flour, almond flour, gingerbread spices and the baking powder in a bowl. Fold it down in the egg mixture.
Melt the margarine and add it in the mixture as well as the orange zest.
Preheat the oven at 175 degrees Celsius.
Cover a baking form with removable edges with a baking paper. Cover the bottom with the orange slices. Add the cake batter on top of the oranges.
Place in the middle of the oven for 30 minutes.
Take out the cake, flip it over and let it cool down. Brush it with the syrup.