Oatmeal Muffins

1 egg
2/3 c. cold cooked oatmeal
2 tbsp. oil
1 c. milk
1 tsp. cinnamon
2 1/2 c. flour
3 tsp. baking powder
2 tbsp. sugar
1/2 tsp. salt

Beat egg. Add oatmeal and oil, mixing well. Stir in milk. Mix flour, baking powder, sugar, salt and cinnamon. Add to oatmeal mixture and stir until moistened. Fill greased muffin cups 2/3 full. Bake at 400 for 20-25 minutes.