Melt the butter in a small saucepan, add the flour, and mix well. Continue cooking over low heat while gradually adding the milk.

Add a few pinches of nutmeg, salt, and pepper.

Remove from heat, then add the cheese and egg yolks one at a time, stirring constantly.

Beat the egg whites until stiff peaks form, then gently fold them into the mixture.

Unroll the pie crust into a tart pan and pour in the mixture.

Bake for 30-35 minutes, then enjoy straight from the oven.