Preheat your oven to 425°
Place the potatoes and carrots onto a rimmed baking sheet, drizzle with olive oil and season generously with garlic powder, onion powder and seasoned salt
Roast in the 425° oven for 20 minutes while you prepare the other ingredients
When the potatoes have been in for 20 minutes, transfer the baking sheet onto a heat proof surface and add the onion, summer squash, asparagus and smoked sausage
Optionally, you can roasted the smoked sausage separately on a small baking sheet to give it better caramelization on its own
Drizzle lightly with olive oil, season with garlic powder, onion powder and seasoned salt and return to the 425° oven
Roast for an additional 20-30 minutes or until the potatoes are tender and everything is lightly caramelized
If you roasted the smoked sausage separately, add it along with all of the juices from the baking sheet over the vegetables and toss everything together before serving
Serve with a small salad and crusty bread