For the filling, place all the cream cheese and mascarpone in a bowl and beat on medium speed with a hand mixer for 4 minutes, a stand mixer for 3 minutes or by hand for 6 minutes, until smooth and no lumps remain.
Add ¼ of the sugar in installments, beating to incorporate until it is fully combined and smooth.
Toss in the vanilla extract and pinch of salt and whip for a further minute.
Add 1 egg and beat until well combined for approximately 30 seconds, repeat with the remaining eggs.
Pour in the cream and whip for a further 4 minutes, until smooth.
Pour the creamy filling into your cake tin and prepare your boiling water (you want the water to come half way up the tin, so this amount of water may vary according to your roasting pan, I recommend at least 4 cups).
Place the cake tin set inside a large roasting pan into the oven as soon as your water is boiling. Allow ¼ of the roasting tray to overhang the oven tray and carefully and slowly pour the boiling water into the roasting tray until it comes half way up the sides of the pan.
Bake for 1 hour 30 minutes until only slightly jiggly in the center and golden on top.
Turn the oven off as the cheesecake cools with the oven door ajar for 1 hour.
Remove the cooled cheesecake from the oven and place in the refrigerator for a minimum of 4 hours.
Slice and serve with a little coulis on the side.
Dig in!