Add wine.
Cook for 1 minute at 104ºC, on speed Stir 1, until well combined.
Add stock, mushrooms and thyme.
Cook for 18 minutes at 100ºC, on speed Stir 1, until absorbed.
Add Parmesan, salt and pepper.
Cook for 1 minute at 90ºC, on speed Stir 1, until well combined.
To serve
Garnish with truffle oil if desired.