For the ganache: Boil the heavy cream in a saucepan over medium-high heat. Pour the cream into a bowl over the milk chocolate and whisk until the chocolate is melted. Pour one ladle of ganache into the bottom of 8 double rocks glasses. Put in the refrigerator and allow to cool while you make the caramel sauce and panna cotta.
For the caramel sauce: Boil the heavy cream in a saucepan over medium-high heat. Put the sugar in a separate saucepan. Add a pinch of fleur de sel to the sugar. Heat the sugar over medium-high heat until it starts to turn a caramel color, 6 to 10 minutes. Slowly add the cream to the dark caramel sauce and whisk together. Allow to cool.
For the panna cotta: Pour 3/4 cup of the milk in a bowl. Sprinkle the powdered gelatin over the milk. Heat the remaining 1 cup milk and the heavy cream in a saucepan over medium-high heat and bring to a light simmer. Pour the milk and cream mixture over the gelatin mixture and whisk until dissolved. Pour the salty caramel sauce into the mixture, whisking as you pour. Distribute evenly into the double rocks glasses over the ganache. Place in the refrigerator for 2 to 3 hours.
When the panna cotta is chilled, garnish with salted peanuts, Caramelized Popcorn, whipped cream or milk chocolate shavings
Make a dry caramel with the glucose and sugar. Heat until it is light caramel in color. Add the butter and mix until melted. Add the salt and baking soda and mix until incorporated. Add the popcorn and toss until evenly coated. Pour on a silicon mat to cool.