Lightly oil a large baking sheet with a small amount of the olive oil. Add the potato wedges to the baking sheet and drizzle with remaining oil.
Combine the salt, garlic powder, Italian spices, and grated Parmesan cheese. Sprinkle evenly over the potato wedges. Toss very well to coat all potato wedges with the mixture.
Spread the wedges into a single layer on the baking sheet. Bake for 30-35 minutes turning wedges halfway through cooking. When done, potato wedges should be golden on the outside and tender on the inside.
Serve with ranch dressing for dipping, if desired.