Makes: 4 to 6 servings
Time: About 1 hour

Ingredients

• 4 tablespoons (1/2 stick) butter, plus more for greasing

• 1/4 cup all-purpose flour

• 1 1/2 cup milk, warmed until hot to the touch

• 6 eggs, separated

• Salt and pepper

• Dash cayenne or 1/2 teaspoon dry mustard

• 1/2 cup grated Cheddar, Manchego, Roquefort, Emmental, and/or other melting cheese

Instructions

1. Grease a …