Preheat oven to 325℉ (160℃)
In a 2-quart saucepan, whisk together egg yolks, granulated sugar, salt and vanilla.
5 Large Egg yolks, ⅓ Cup Granulated sugar, ⅛ teaspoon Sea salt, 1 Teaspoon Vanilla extract
Heat custard over medium-low heat until it begins steaming. Whisk slowly and constantly while heating. Tip - don't stop whisking else you may end up with scrambled eggs!
Once the custard starts to steam, slowly pour in the heavy cream/mango puree mixture while whisking the whole time. Keep whisking and continue to heat until it begins steaming.
Remove saucepan from heat.
Pour the mixture through a mesh sieve set over a bowl. This will catch any bits of cooked egg or mango that may have clumped together.
Put the ramekins in a roasting pan that has sides at least 2 inches high.
Place two tablespoons of diced mango into each ramekin.
½ Cup Mango
Pour custard over the mangos - dividing equally between each ramekin.
Carefully pour hot water into the roasting pan until it comes about halfway up the sides of the ramekins.
Bake for 30 minutes - the custard will be set but still have a slight jiggle in the center. If unsure sure whether the custard is done baking, insert an instant-read thermometer into the center of one ramekin. The internal temperature should reach 180°F (82℃).
Use tongs to move the ramekins to a wire rack so they can cool. Once they’ve cooled down, put them in the refrigerator to set for about 3 hours.
Sprinkle a few teaspoons of sugar evenly over the top of the custard. Then, use a kitchen blow torch to melt and caramelize the sugar until it forms a golden, crispy topping.
3 Tablespoons Raw sugar
Note - You can also caramelize the sugar by placing the ramekins under a preheated broiler for about 2 minutes, or until the sugar is melted and golden.
Serve the crème brûlée within a few minutes after caramelizing the sugar so the topping stays crisp.