Spiced Oatmeal and Blueberry Muffins

Name: Spiced Oatmeal and Blueberry Muffins
Ingredients: 1 cup oatmeal; 1 cup buttermilk*; 1 cup all purpose flour; 1 teaspoon baking powder; 1/2 teaspoon baking soda; 1/2 teaspoon kosher salt; 1 teaspoon cinnamon; Pinch nutmeg (scant 1/4 teaspoon); 4 tablespoons butter, melted; 1/4 cup oil (canola or vegetable); 1 egg, lightly beaten; 1/2 cup light brown sugar; 1 teaspoon vanilla extract; 1 1/2 cups blueberries, fresh or frozen