In a large mixing bowl, whisk the egg yolks and sugar; set aside.
Put the chocolate in a microwave-safe glass bowl. Microwave for 30 seconds, and stir. Repeat until the chocolate is mostly melted, then remove from the microwave and set aside at room temperature.
In a small saucepan, slowly bring the cream and milk to a low simmer, then remove the pan from the heat.
Slowly whisk the hot cream into the egg/sugar mixture, then whisk in the melted chocolate until fully combined.
Add the orange zest and juice, vanilla, and sea salt and whisk to combine. Pour the custard into 6 ramekin dishes.
Pour 1 ½ cups of water into the pressure cooker and put in the bottom level of the trivet. Put three of the ramekins on it.
Put the top trivet on and put the other three ramekins on it.
Close the Foodi lid and move the slider to the PRESSURE position. Make sure the pressure release valve is in the SEAL position.
Set the cook time to 6 minutes.
Turn the dial to set "PRESSURE" to "DELAYED RELEASE" and set the time to 15 minutes.
Press START/STOP. The Foodie will come to pressure, cook for 6 minutes, hold pressure for 15 minutes and then release. It will beep when done. Turn the valve lever to VENT to release any additional pressure.
Open the FOODIE from the front... do NOT open from the side! Carefully remove the ramekins and allow them to cool. Once they're at room temperature, put them in the refrigerator to chill and set up for at least 4 hours, preferably overnight.
Serve with whipped cream if desired. (And who doesn't desire whipped cream?)
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