The cheese does not stick to the foil. 15 minutes on manual or pressure cook depending on your model. 
I'm sold on the burgers! 2nd time this week and the kids love them. Season, top with your faves, loosely wrap with foil (we use a sharpie to write initials for identification purposes). Into the magic cauldron for 15 minutes and QR. So tasty and clean up is a breeze. No hot grill or oven. 
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