• Preheat oven to 400 degrees. In large bowl, combine oatmeal, flour, baking powder, baking soda, cinnamon and nutmeg. Stir in sweet potatoes, brown sugar, oil, milk, egg and vanilla, just until well moistened. Add chocolate chips to the mixture, if using. Fill muffin tins 3/4 full.

Topping:

• Sift together the dry ingredients. Cut butter into the mixture by adding it in small chunks, about 1/2 tablespoon at a time. Combine until the mixture looks like coarse meal. Sprinkle the Crumble Topping. Bake 30 – 35 minutes. Makes 18 muffins.