muffin recipe

When we are all in the studio, around 4 we pause for a cup of tea and a snack. Often the snack is a treat brought in by one of the students, but often I make up a batch of muffins. Here is my basic recipe:
1 cup large rolled oats
1/4 cup cornmeal
3/4 cup flour
1/4 cup brown sugar
2 teaspoons baking powder
1/2 teaspoon salt
1/2 cup mashed fruit [banana, grated apple, pumpkin, etc]
1/2 cup chocolate chips
1/2 cup mixed seeds [pumpkin, sunflower,sesame, walnuts]
3/4 cup milk
2 eggs
1/2 cup oil
mix lightly, spoon into greased molds [12 large]
bake at 350 for about 20 minutes
this is a loose recipe, feel free to freestyle