2. Purée strawberries and sugar in a blender until very smooth. Press through a sieve into a bowl; discard seeds. Stir in vanilla. Remove 1 cup for the panna cotta; reserve remaining purée.
3. Sprinkle gelatin over 1⁄4 cup water in a small custard cup; let stand 5 minutes to soften. Place cup in a small skillet of simmering water; stir until gelatin is dissolved. Simmer milk in saucepan. Remove from heat; stir in dissolved gelatin. Transfer to a 1-qt glass measure; stir in reserved 1 cup strawberry
purée and the cream until well blended. Pour into ramekins. Chill, covered, until firm, about 4 hours or up to 2 days.
4. To unmold, run a small knife around each; invert onto plates, gently shaking to remove. Spoon some of the reserved strawberry sauce onto panna cotta.
