Coffee Cakes: Rhubarb Coffee Cake

Ingredients

• 3 1/2 cups diced rhubarb*
• 3/4 cup sugar
• 3 Tbls. cornstarch
• 3 Tbls. cold water
• CAKE: 1 1/2 cups flour
• 1 tsp. cinnamon
• 1/2 tsp nutmeg
• 1/2 tsp salt
• 1/2 tsp. baking powder
• 1/2 tsp baking soda
• 3/4 cup margarine
• 2 eggs
• 3/4 cup buttermilk
• 1/2 tsp. almond extract
• TOPPING: 1/2 cup sugar
• 1/2 tsp cinnamon
• 1 Tbls. margarine
• 1/2 cup chopped walnuts ( optional)