Preheat oven to 425°. Line a large baking sheet with parchment paper. Set aside.
In a large bowl, whisk together 3 tbsp of apple cider vinegar and 3 tbsp of olive oil until well combined.
Add oregano, marjoram, salt and pepper. Whisk until combined.
Add halved potatoes to bowl and toss to coat.
Using a slotted spoon (to help drain the excess liquid) spoon potatoes onto baking sheet. Flip each potato so they are cut side down.
Bake in preheated oven for 45-50 minutes or until pototoes are tender when pierced with a fork.
Let cool for 15 minutes.
Toss potatoes with remaining 1 tbsp of vinegar and 1 tbsp of olive oil on baking sheet.
Sprinkle with chopped parsley and flaky sea salt (optional).
Enjoy!