Orange-Chocolate Cheesecake

I was pretty unsure about this Cheesecake as I was doing it completely on my own and I was afraid of many, many things. But... I served it and all the guests were stunned! Asking where did I buy it. And they were even more shocked when I told them that I did it on my own :) And everyone, literally, everyone asked for the recipe! That's the best award I could have got for that cheesecake :) So now I'm sharing the secret for a perfect Christmas Cheesecake with You :) 
Some details: This cheesecake has a consistency of a mousse, so it melts on a palate, it's quite refreshing, because of oranges and what is its biggest advantage - it's easy and quick to prepare, because without turning on the oven ;) Enjoy! :)

Bottom of the cake:

• 200g of chocolate shortbread-like biscuits
• 80-100g of melted butter

Cheesecake: (all the ingredients must be in a room temperature except for water)

• 500g of cheesecake cheese (might be vanilla flavoured)
• 250g of mascarpone cheese
• 250ml of 36% cream
• 100-140g of powdered sugar* 
• 1/2-1 teaspoon of orange extract
• 100g of orange skin
• 40g of powdered gelatin
• 140 ml of boiling water

Decoration:

• Orange slices
• Icing sugar
• Star anise

*About the powdered sugar: here are two nice propositions. First one, is to add a lot of powdered sugar to the cheesecake - around this 140g. If so, the cheesecake mousse is really sweet. But, it is also a good idea, to add only around 90-100g of powdered sugar and after the cake is done, to distribute Royal Icing(recipe is here) on the top of the cake.

Preparation:

Bottom:

1. Take a springform cake tin. 
2. Put baking paper on the bottom of the tin.
3. Take the cookies and crumble them on a very small, sand-like pieces.
4. Mix precisely with butter. It needs to have a consistency of a wet sand.
5. Put in a tin, align, make smooth, knead.
6. Put in the fridge for at least 20 minutes.

Cheesecake:

1. In a glass, mix gelatin with hot water and stir till gelatin melts completely. Put aside so that it cools down.
2. Take a mixer and its bowl. Put cheesecake cheese inside, add mascarpone, cream and mix till completely smooth.
3. Add powdered sugar and orange extract and mix till smooth again (it is advisable to taste the cheesecake to check if it is sweet enough).
4. Take a spoon. Take around 3 tablespoons of the cheesecake mixture and mix with gelatin. Stir precisely, it needs to link.
5. Put the gelatin-cheesecake mixture back in a mixer's bowl. Mix precisely.
6. Add orange skin and mix again.
7. Pour on the bottom. Put in the fridge till it stiffens.
8. If desired - add icing and decorate for example with oranges, anise.
9. Keep in the fridge.
10. Bon Appetit! :)