Preheat the oven to 450°F. Spray a baking sheet liberally with cooking spray. Set aside.
Clean the potatoes and remove any blemishes leaving the peel intact. Cut the potatoes into similar size chunks.
Add potatoes to a mixing bowl. Toss potatoes with olive oil, Parmesan cheese, rosemary, garlic salt, black pepper, dried Italian seasoning and onion powder. (Reserve 1/2 Tbsp of chopped rosemary and 2 Tbsp of grated Parmesan for garnishing.)
Arrange potatoes on the prepared sheet pan in a single layer cut side down.
Roast potatoes for 30-35 minutes until fork tender and golden brown. Turn halfway through cooking for even browning. Remove from the oven, and drizzle with additional olive oil.
Sprinkle with reserved 2 Tbsp of grated Parmesan cheese and fresh rosemary just before serving.
Notes
Potatoes - You can use russet potatoes, yellow potatoes or white potatoes for this parmesan potatoes recipe. You could also adapt it using a variety of petite potatoes like I did in this recipe for Air Fryer Crispy Potatoes. The purple and yellow potatoes are like eye candy on your plate!
Cut Potatoes into Uniform Pieces - When cubing the potatoes, keep the pieces similar in size. This will allow for even roasting. I recommend cutting these into 1-inch chunks.
Garlic Salt - You can use plain salt and granulated garlic or garlic powder.
Fresh Herbs - You could use fresh parsley, chives or thyme for herbed roasted potatoes.
Spices - You can sprinkle these garlic-roasted potatoes with crushed red pepper flakes for spice.
Parmesan Cheese - My first choice would always be using freshly grated Parmesan cheese for these roasted potatoes. In a pinch, you can use canned Parmesan cheese, Parmesan-Reggiano or Parmesan-Romano cheese for this recipe.
Lighter Options - To cut calories for this easy side dish, you can use an oil mister or cooking spray in place of olive oil. The key to this is liberally spraying the potatoes so they’ll roast beautiful and crispy.