Creating your own Grilled Cheese and Tomato Soup Casserole can be a fun and straightforward process. Just follow these easy steps:

1. Preheat the Oven: Set your oven to 350°F (175°C) to prepare for baking.
2. Prepare the Tomato Base: In a large mixing bowl, combine the crushed tomatoes, vegetable broth, dried basil, garlic powder, onion powder, sugar, salt, and pepper. Mix well to combine.
3. Grease the Baking Dish: Lightly grease a 9×13-inch baking dish with olive oil to prevent sticking.
4. Layer the Ingredients:
– Pour half of the tomato mixture into the prepared baking dish.
– Place 4 slices of bread on top of the tomato mixture.
– Sprinkle with half of the cheddar and mozzarella cheese.
5. Repeat the Layers:
– Pour the remaining tomato mixture over the cheese.
– Add the remaining bread slices on top.
– Top with the rest of the cheese and sprinkle with Parmesan cheese.
6. Bake: Cover the dish with aluminum foil and bake for 30 minutes. Then, remove the foil and bake for an additional 10-15 minutes, until the cheese is bubbly and golden brown.
7. Cool: Once done, remove from the oven and let it cool for about 10 minutes. This will make it easier to serve.
8. Garnish: If desired, garnish with fresh basil before serving.

These steps will guide you in creating this delectable casserole that combines the beloved flavors of grilled cheese and tomato soup into one amazing dish.