Sprinkle gelatin over cold water. Let sit 5 minutes until spongy.
Heat cream, milk, sugar, and salt over medium-low until steaming and sugar dissolves. Do not boil.
Remove from heat. Whisk in bloomed gelatin until fully dissolved. Stir in vanilla.
Cool 10 minutes. Strain and pour evenly into 6 lightly greased ramekins.
Cool to room temperature, cover, and refrigerate at least 4 hours or overnight.
Run a knife around the edge, invert onto a plate, top with berries or coulis, and serve.