Heat the oven to 400 F. Line a muffin pan with paper or foil liners.
In a large bowl, add the flour, sugar and baking powder. Stir to mix evenly.
In a separate bowl, combine the milk, oil, egg substitute, cornmeal, corn and green pepper. Add to the flour mixture and blend just until moistened but still slightly lumpy.
Divide the mixture among the 12 muffin liners. Bake 20 minutes or until muffins are light brown.