01 -
Preheat the oven to 300°F (150°C). Line a large baking sheet with parchment paper.
02 -
Place the egg whites in a clean metal or glass bowl and the yolks in a separate medium bowl. Keep every bit of yolk out of the whites.
03 -
Add the cream of tartar and half the salt to the egg whites. Beat with an electric mixer until stiff glossy peaks form, about 3-5 minutes.
04 -
Beat the softened cream cheese, egg yolks, parmesan, and remaining salt until mostly smooth. A few tiny cream cheese specks are fine.
05 -
Fold the yolk mixture into the whipped whites in two additions using a wide spatula. Work slowly and stop as soon as the mixture looks evenly combined.
06 -
Spoon the batter into 6 mounds on the prepared sheet. Spread each mound into a 3-4 inch round, keeping some height in the center.
07 -
Bake for 18-22 minutes, until puffed, lightly golden, and dry to the touch. Cool on the pan for 10 minutes, then transfer carefully to a rack.