Preheat oven to 325 degrees. In a small pot over low heat, add whipping cream, salt and chocolate. Whisk continuously until chocolate has melted and mixture is smooth.
Use electric mixer to beat egg yolks and 1/4 cup of sugar until lightened, about 4 minutes.
With mixer on low speed, slowly pour heated cream into eggs. Mix until just combined.
Spread ~1 tablespoon strawberry preserves into the bottom of six, 5 ounce sized shallow ramekins. Then, divide and pour chocolate mixture into each of the ramekins.
Place ramekins in an oven safe baking dish. Fill dish with warm water until water is about halfway up the sides of the ramekins.
Bake for 20-25 minutes, or until custard is set but center just barely jiggles. NOTE: Baking time will vary depending on shape/depth of ramekins.
Remove ramekins from water and let cool for about 30 minutes at room temperature. Then transfer ramekins to refrigerator for at least 3-4 hours.
Before serving, remove ramekins from refrigerator and sprinkle 1 teaspoon of sugar evenly over the top of each custard.
To caramelize the sugar, you can use a blow torch, or place the ramekins on the top rack of your oven on broil.