Sweet Potato Muffin with Oats

1 1/4 cup oats (old-fashioned)
1 cup all-purpose flour
1 tsp baking powder
1/2 tsp baking soda
1/2 tsp salt
1/2 tsp nutmeg
1/2 tsp cloves
1 tsp cinnamon
1/3 cup chopped walnuts
1/2 cup canola oil
3/4 cup brown sugar
1 egg
1 cup mashed sweet potato (or canned pumpkin)
1/4 cup milk
1/4 teaspoon vanilla

1/4 cup flour
1/4 cup brown sugar
1 teaspoon cinnamon
1/4 cup butter or margarine
1/4 cup oats
3 tablespoons chopped walnuts

- Combine dry ingredients, add moist ingredients. Stir until just moistened; do not overmix.
- For the topping: Cut in the butter or margarine with the flour, brown sugar, and cinnamon. When the mixtiure is crumbly, add the oats and walnuts.
- Fill greased or paper-lined muffin tins 2/3 full. Sprinkle with the topping. Bake at 400 degrees F. for 16 to 20 minutes. Make 1 dozen medium muffins.