Seafood Gumbo with shells

4 quarts water 3 tablespoons butter 4 cups okra , sliced 6 large tomatoes , chopped (2 large can of tomato substitute) 2 onions , large and chopped 1 cup[...]

1 small onion , finely chopped 2 stalks celery , peeled and finely chopped 2 garlic cloves , minced 1 tablespoon fresh thyme leaves or 1 teaspoon dried thyme[...]