Pour olive oil into a small saucepan and add your garlic and heat up until just warm. Place your potatoes in a large microwave safe bowl and add 2 tablespoons of your oil. Cover with a lid that has a steam slot, or with plastic wrap. Microwave for 6 minutes, stopping at 3 to stir them around. Add your remaining olive oil and your parmesan cheese to the potatoes and mix well. Place on a cookie sheet and bake for 30-40 minutes in a pre-heated 450 degree oven, turning once mid-way through. Sprinkle with additional parmesan before serving, if desired.