Scallops with shells

6 tablespoons butter 1/4 cup onion, yellow finely chopped 2 tablespoons scallions, spring or green onions finely chopped 2 teaspoons garlic finely chopped 1[...]

1 lb small bay scallop 3 cups sliced mushrooms 4 green onions , sliced 2 tablespoons water 1/4 cup dry white wine 1/4 cup butter 3 tablespoons flour 1/2[...]