Step 1

Preheat oven to 400 degrees F. Place potatoes on a baking sheet.

Step 2

Bake 55 to 60 minutes, or until tender.

Step 3

Meanwhile, in a large bowl, combine oil, garlic, salt, if desired, and pepper. Add broccoli, cauliflower, and onion; toss until evenly coated. Place on another baking sheet and bake with potatoes for remaining 25 to 30 minutes of cooking time, or until vegetables begin to brown on edges.

Step 4

Toss vegetables with Italian dressing and spoon over opened baked potatoes.