Crackly bits of baked parm cheese add an addictive crunch to these potato skins
Preheat oven to 400°F.
Heat EVOO in a small pot, add butter and garlic, and swirl a minute or 2. Pour garlic oil and butter into a shallow baking dish or small baking sheet, sprinkle with parm cheese in an even layer, add potatoes cut-side down, and bake 40-45 minutes until just tender. Cool for 5-10 minutes before turning; this will allow the browned parm cheese to adhere to the potatoes.
Combine aioli ingredients in a bowl.
Serve potatoes with balsamic ketchup aioli and garnish with red pepper flakes and parsley.