Place sausage, onions, red pepper, and green pepper on a parchment lined baking sheet. Drizzle olive oil over the top and sprinkle a generous amount of salt and pepper. Gently massage the seasonings into the onions and pepper

In a 425F degree preheated oven, bake for 25-30 mins or until sausage is golden brown and onions/peppers are caramelized

Optional: Serve on hot dog buns with mustard and your favorite sides, enjoy!