Preheat the oven to 350°F. Boil water in a saucepan to prepare for a water bath. Add egg yolks sweetener to a bowl and whisk until very smooth. Add in the salt and vanilla bean, and whisk until combined.
Heat cream in a saucepan over medium heat until just below boiling. Once the cream is hot, pour some of it into the egg yolk mixture very slowly, whisking continuously to temper the eggs and until all of the cream is incorporated.
Place the ramekins inside a deep baking dish, then fill them with the custard mixture. Add in the boiling water to create a water bath. It should be about halfway up the sides of the ramekins.
Bake for 40-50 minutes, until the custard is set but still a bit jiggly. Allow to cool for about 15 minutes, then remove from the water bath and cool, covered in the fridge for up to overnight, but at least 1-2 hours. You want the custard to cool completely before moving on to the next step.
Once the custard is completely set, add enough granular sweetener to cover the top in a thin layer. The amount you will need depends on the surface area of your ramekin. Gently brulee with a torch until crispy and golden, being careful not to burn. Allow the creme brulees to sit for a few minutes for the sugar to solidify to create that perfect crunchy topping. Garnish with berries. Crack in, and enjoy right away!
Store leftovers in the fridge in an airtight container for up to 4 days. We do recommend waiting to brulee the tops until it is time to eat, as this creates the best experience.