Cook the chopped spinach according to the package directions and set it aside.
Sauté the chopped onion, green onions, and garlic in the olive oil.
Take the onion and garlic mixture off the heat and set it aside.
Stir the eggs, 1 cup of the breadcrumbs, the sautéed onion and garlic mixture, Tabasco, Worcestershire sauce, thyme, salt, pepper, and Parmesan into the cooked spinach.
Arrange the thick tomato slices in a buttered baking dish.
Spoon the spinach mixture onto each tomato slice.
Sprinkle the remaining breadcrumbs over the spinach topping.
Bake at 350 degrees for 15 minutes.