About half an hour before mousses are ready, start making the famous mirror glaze.
Hydrate gelatin again, just like before. While it's hydrating, prepare the rest of the glaze.
Add condensed milk, sugar, vanilla, and water in a medium-sized pot on medium heat. Then mix, and when the gelatin is firmer, add it to the liquid and mix until it's completely dissolved. Now, remove the mix from the heat.
Add white chocolate and melt it with the mix slowly and gently. Here avoid mixing it too much to prevent letting in the air.
Separate the mixture into two containers to make two colors of glaze.
You can use your favorite colors. For instance, I picked red and pink. Here use gel coloring so that the texture doesn't change. Now, let the glaze cool for a bit because they need to be at room temperature. Between 93 and 99 degrees Fahrenheit, so it works better.
After a while, check them. If the temperature is correct, take the mold out of the freezer and remove each mousse carefully.
Put the mousses in a rack that has waxed paper below. Then, glaze the mousse. Now, wait a bit before pouring a second layer. You can make a different design in this step.
Stick the mousse hearts in the fridge before serving for at least 15 minutes. You can also cool them at room temperature for 30 minutes if you have spare time.
Then, you'll only want to gift these beautiful mousse hearts to your loved ones! -or indulge yourself ;)