Cook spinach and drain well. Set aside. Melt butter and sauté shallots and thyme. Add bread crumbs and sauté and stir until crumbs are toasted. Then add Herbseint or Pernod, mixing thoroughly. Add drained oysters and simmer until oysters curl at edges. Then add parsley and spinach and season to taste. Place in shallow casserole dish and bake for 20-25 minutes.