Preheat the oven to 400℉.
Chop all of the vegetables into bite-sized pieces. Place them on the sheet pan.
Drizzle oil over the vegetables then sprinkle with salt, pepper, garlic powder, and parsley. Toss to coat the seasoning on all of the vegetables.
Cut sausage into rounds then add to the pan. Spread everything in a single layer on the sheet pan.
Bake for 20 minutes flip and sprinkle with parmesan cheese. Continue baking for 10-15 minutes or until the sausage is cooked, the vegetables are tender, and the cheese is melted. Sprinkle with fresh herbs. Serve. Store leftover sausage and vegetables in an airtight container in the refrigerator for up to 4 days.