Bring 2 cups of water to a rolling boil. Pour into a large bowl, sprinkle the gelatin powder over the top, and whisk continuously for 2 minutes until completely dissolved.
Stir in the 1/2 cup of cold water and let the mixture sit at room temperature for 15 minutes to temper.
Briskly whisk the ice-cold evaporated milk into the warm gelatin mixture until it turns a cloudy, milky pink.
Pour the mixture into a lightly oiled 6-cup mold or individual serving glasses.
Refrigerate uncovered for 1 hour, then cover loosely and chill for an additional 3 to 5 hours until completely firm and the layers have magically separated.
To serve, dip the mold briefly in warm water to loosen, invert onto a platter, and garnish with fresh berries and mint.
