Preheat oven at 430 degrees Fahrenheit (220 Celsius)
Rinse and dry the olives.
In a bowl, add the olives, olive oil, garlic and oregano (rub the oregano between your fingers to release the aroma) and mix well.
Spread the olives on a pan covered with aluminum foil, sprinkle some salt and pepper.
Roast for about 12 minutes, remove from oven, add some chopped parsley and lemon peel and serve.