Jarlsberg Shrimp Bisque

1 pound shrimp, shelled and deveined
2 tablespoons butter
2 cups sliced mushrooms
1/2 cup sliced scallions
1 small clove garlic, minced
6 cup milk
2 cups shredded Jarlsberg cheese
1 cup cooked cut green beans
1/2 cup shredded carrot
3 tablespoons chopped parsley
1/4 teaspoon oregano, crushed
Shredded Jarlsberg cheese (for garnish)

In large saucepan; saut