I do a peanut butter/flax hot cereal when I need to lower my carbs and have a quick and filling breakfast. I don't miss my normall oatmeal at all when I do this. recipes.sparkpeople.com/recipe-detail.asp?
You don't need to add the cocoa powder. I used to always do it with just cinnamon, then I add unsweetened cocoa when I wanted an indulgence.