Step 1

Preheat oven to 425 degrees.  Grease a 2 quart casserole dish with olive oil.

Step 2

Toss carrots, potatoes, onions, and zucchini together with oil, garlic and salt, and pepper.

Step 3

Pour the vegetables into the prepared pan. Top with marinara sauce and freshly sliced tomatoes if using.

Step 4

Roast for 45 minutes at 425.

Step 5

Remove the casserole from oven and grate fresh Parmesan cheese over the dish.