Preheat oven to 350°F (175°C).

Grease a baking dish.

In a large bowl, cream together the margarine and flour.

Gradually add the milk, stirring until smooth.

Stir in the cream-style corn and sugar.

In a separate bowl, beat the egg yolks until light and fluffy.

Add the egg yolks to the corn mixture and mix well.

In another clean bowl, beat the egg whites until stiff peaks form.

Gently fold the egg whites into the corn mixture.

Pour the mixture into the prepared baking dish.

Bake for 45 minutes, or until golden brown and set.

Let cool slightly before serving.