This easy one-dish meal is bound to become a regular in your dinner rotation--it's super simple and comes together quickly. Be sure to preheat your sheet pan--adding vegetables to a hot pan helps start the charring and caramelization, without steaming your veggies. And remember, you are only heating up your sausage, not cooking it from raw in this recipe, but if you substitute with fresh sausage (which you can), you'll need to cook the sausage longer.