Preheat your oven to 325°F (160°C).
In a saucepan, heat the cream and vanilla bean until just boiling. Remove from heat and let it sit for 15 minutes.
In a bowl, whisk together the egg yolks and ½ cup sugar until pale and thick.
Slowly pour the cream into the egg mixture, whisking constantly.
Strain the mixture through a fine sieve into a large measuring cup or bowl.
Divide the mixture among 4 ramekins. Place the ramekins in a baking dish and pour hot water into the dish until it reaches halfway up the sides of the ramekins.
Bake for 40-45 minutes, or until the custards are set but still slightly jiggly in the center.
Remove the ramekins from the water bath and let them cool to room temperature. Refrigerate for at least 2 hours or overnight.
Before serving, sprinkle 1 tablespoon of sugar evenly over each custard. Use a blowtorch to caramelize the sugar until it forms a crispy top.