In a bowl, mix olive oil, parsley, preserved lemon, chile, oregano, and green peppercorns.
Cut feta into ½-inch cubes and gently toss with the olive oil mixture until coated.
Transfer to a jar or container and add more olive oil if needed to cover the feta.
Refrigerate for at least 24 hours to let the flavors develop.
Remove from the fridge 30 minutes before serving to allow the oil to soften.
Serve with crackers, crostini, or as a topping for fish, veggies, pasta, or salad.