If you want to give the potatoes just a subtle hint go garlic, smash the garlic cloves instead of mincing them. This way, they will have some of that garlic flavor, but it won’t be as strong.
When the baking sheet is really hot, the food will start to sizzle as soon as it hits the baking sheet. It speeds up the cooking process and helps the ingredients get better browning. It’s kind of like heating up a skillet first before adding your ingredients to it.