Step 1

Preheat oven to 450 degrees

Step 2

Separate egg whites from yolks, putting the egg whites into a mixing bowl and the egg yolks each into a separate small bowl

Step 3

With electric mixer, beat egg whites until stiff peaks form (2 or 3 minutes)

Step 4

Gently fold in the grated cheese

Step 5

Form 4 puffs on the baking mat with an indent in each puff (see photo)

Step 6

Bake for 3 minutes. (You could put in the egg yolks now if you like them a little more cooked)

Step 7

Remove from oven, drop one egg yolk into each indented puff.

Step 8

Bake for 3 more minutes.

Step 9

Remove from baking sheet with a spatula, sprinkle with salt and pepper, add your butter on top and eat!