Split pitas horizontally into 2 rounds. Spread rough edges with margarine. Place on cookie sheet.
In a small bowl, toss together oregano and Parmesan cheese. Sprinkle over margarine.
Cut each bread into wedges. Broil about 5" from heating element until crisp, about 2 minutes. Watch carefully!
VARIATIONS: experiment with other herbs of your choice such as chives and parsley; or, omit oregano and sprinkle with sesame seeds. Serve alone or with dips or pates.