Preheat oven to 450 degrees.

Remove shells from shrimp, leaving last segment and tail intact; remove vein.

Rinse and dry.

In a pan saute onion in oil until transparent, (adding a few drops of water if necessary), add garlic and green onion and cook 2 minutes more.

To the onions add the tomatoes, wine, half the parsley, oregano, and salt and pepper to taste.

Reduce heat, cover and simmer for 30 minutes until thickened.

Pour half the sauce into a shallow casserole, and arrange the shrimp on top.

Pour the rest of the sauce on, and sprinkle crumbled feta over the shrimp.

Bake at 450 degrees for 10-12 minutes or until prawns are pink and feta is lightly browned.

Garnish with remaining parsley and serve.