My family has been using this very simple and delicious recipe for sausage, peppers, and onions for years and years now. For an extra kick, try using half sweet sausage and half hot sausage!
For maximum heat, leave the seeds and membranes in the pepper; habanero will be much hotter than serrano. Ever touched your lips or eyes after chopping hot peppers? Avoid those burns by wearing gloves to prevent the pepper's heat from penetrating your skin.