Add the milk, cream, 45g of the sugar and egg yolks to a pan and whisk briefly to combine before placing over a low heat until it reaches approx 82-84c (179-182f) - making sure to stir frequently.
Place the chocolate into a large jug and pour over the hot cream mixture to melt. Use a stick blender if you have one to emulsify, though you can also use a whisk and do this by hand - just let the cream mixture sit on the chocolate for a minute to help melt the chocolate.
Allow this mixture to cool to approx 40c (104f). Meanwhile whisk the egg whites with the remaining 50g of sugar until you have stiff peaks.
Once the chocolate mixture has reached 40c, add one spoon of the egg whites and mix well to combine and loosen the chocolate mixture.
Then fold the rest through carefully in 2-3 goes..
Pour into your chosen mould and set - anywhere from 4-6 hours.
Serve with a drizzle of olive oil and flaky sea salt.