Preheat oven to 400 degrees F. Arrange oysters in shells on rock salt in a baking dish. Process spinach, onion, bay leaves, celery, parsley and seasonings in a food processor until smooth. In a saucepan, cook spinach mixture in butter for 5 minutes. Add breadcrumbs and lemon juice, mixing well. Spoon the spinach mixture on top of oysters and bake at 400 degrees F until oyster edges curl.

Yield
6 servings