01 - Set oven temperature to 425°F and prepare a baking sheet with parchment paper or light greasing.
02 - Place whole potatoes in a large pot, cover with cold water, add salt, bring to a boil and cook until fork-tender, about 15 to 20 minutes.
03 - Drain potatoes and allow to steam dry for 2 minutes; arrange them spaced apart on the baking sheet.
04 - Gently flatten each potato to approximately ½ inch thickness using the bottom of a glass or a potato masher.
05 - Combine olive oil, minced garlic, sea salt, black pepper, and Italian herbs; evenly brush or spoon over each smashed potato.
06 - Generously sprinkle freshly grated Parmesan over the potatoes.
07 - Bake in the preheated oven for 15 to 20 minutes until edges are crisp and golden brown.
08 - Remove from oven, sprinkle with chopped fresh parsley if desired, and serve immediately.