This is what to cook when you have assorted vegetables on hand and not a lot of time to stand at the stove. It only requires a little chopping, and once the dish goes in the oven you'll have time for other things. The colorful vegetables sweeten with roasting and go nicely with chicken-apple sausage (or any other type of precooked sausage) and caramelized onion. We like to keep things simple by seasoning just with salt and pepper and a good splash of olive oil—nothing else is needed for this full-flavored dish. Plus, it meets all of our criteria: simple to prepare, healthy, yummy, and cheap.