In a small bowl, mix together the extra-virgin olive oil, sliced jalapeño, garlic, dry chili peppers, dried oregano, chopped parsley, and lemon zest until well combined.
Pour the marinade over the feta cubes, making sure they are covered by at least 1/2 inch of oil. Cover the container and let it sit in the refrigerator for 30 minutes to allow the flavors to blend.