Add extra flavor to the popovers by stirring in 1/2 teaspoon dried basil or rosemary leaves or 1/4 teaspoon grated lemon peel with the flour, milk, sugar and salt.
Bake popovers and cut the slit in top of each. Cool, wrap tightly and freeze. When ready to serve, insert cheese chunk in each frozen popover. Place in muffin cups. Heat in 350°F oven 8 to 10 minutes or until cheese is melted.