Among 4 (10-oz) custard cups or ramekins, divide raspberries evenly. In 2-quart saucepan, mix granulated sugar, cornstarch and salt. Stir in milk. Heat to boiling over medium heat, stirring frequently. Stir in vanilla. Spoon over raspberries.
Set oven control to broil. Sprinkle 1 teaspoon brown sugar over mixture in each custard cup. Broil with tops 4 to 6 inches from heat 2 to 3 minutes or just until brown sugar is melted. Serve immediately. Store covered in refrigerator.