Grease and flour a 9x9 inch pan
Combine water and bran. Let stand 2-3 minutes while creaming the margarine and sugar. Add egg whites and vanilla to bran mixture. Beat well. Add flour, cinnamon, soda and salt. Mix well. Pour into prepared pan . Bake at 350°F for 30-35 minutes.
Combine topping ingredients and spread on hot cake.
Broil until bubbly (about 2-3 minutes).
Fat 1 g.
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