Dark Chocolate Orange Cake

dark chocolate (good quality brand) ((300 grams))

eggs

egg yolk

sugar ((170 grams))

zest of 1 orange

+ 3 tablespoons Greek yogurt ((175 grams))

vegetable oil ((100 grams))

flour ((240 grams))

baking powder ((15 grams))

baking soda ((2.5 grams))

salt ((2.8 grams))

cream ((360 grams))

cream cheese ((I used light cream cheese) (187.5 grams))

+ 1 tablespoon powdered/icing sugar ((39.05 grams))

zest from 1/2 orange ((if desired))

Peel of 1 orange thinly sliced

Peel of 1 lemon thinly sliced

sugar ((150 grams))

water ((60 grams))