Preheat the oven to 425 degrees F (220 degrees C).

In a bowl, prepare basting sauce by combining olive oil, onion, garlic, thyme, rosemary, sage, marjoram, salt, pepper, and hot pepper sauce.

Turn chicken breasts in sauce to coat thoroughly. Place skin-side up in a shallow baking dish. Cover.

Roast chicken in the preheated oven, basting occasionally with pan drippings, for about 35 to 45 minutes. Remove to a warm platter, spoon pan juices over chicken and sprinkle with fresh parsley.