Heat the panna cotta to 70°C and pour 80 g of the product into vacuum-sealed jars. Close the lid and bake in the oven at 80°C for 10 minutes.
Caramelise the sugar and glucose at 160°C. Deglase with the cream. Add salt and vanilla, cool to 60°C, then add the butter and condensed milk. Emulsify well using an immersion blender and pour into a 25 ml single-serve jar.
Slightly warm the topping in the glass jar. Pour over the panna cotta in the vacuum-sealed jar and serve.