Breakfast Apple Muffins

Ingredients

• 2 cups rolled oats, finely ground
• 1/2 cup flour
• 2 tablespoons whole wheat flour
• 1/2 cup brown sugar
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1-1/2 teaspoons cinnamon
• 1/4 teaspoon nutmeg
• 1 cup buttermilk
• 3 egg whites
• 1 tablespoon butter, melted
• 3 tablespoons corn oil
• 1 teaspoon vanilla
• 1 apple, peeled and finely chopped
• 1 tablespoon sugar