grandma's best lazy daisy oatmeal cake

Ingredients

• 1 1/4 cups boiling water
• 1 cup oatmeal, uncooked
• 1/2 cup margarine
• 1 cup brown sugar
• 1 teaspoon vanilla extract
• 2 - eggs
• 1 cup sugar or splenda
• 1 1/2 cups all purpose flour
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 3/4 teaspoon cinnamon
• 1/4 teaspoon nutmeg
• COOKED CARMEL FROSTING
• 1 1/2 cups brown sugar
• 2 tablespoons butter
• 3/4 cup milk or cream
• 1/2 teaspoon vanilla