To prepare the tuna for the casserole, you will need canned tuna. Open the can and drain the excess water or oil. You can use a fork to break the tuna into small pieces or chunks. If you prefer a smoother texture, you can use a food processor to pulse the tuna until it is finely chopped.
The noodles are a crucial part of the casserole, and you need to prepare them correctly. Choose wide egg noodles for the best results. Boil the noodles in salted water until they are al dente, which means they are cooked but still firm to the bite. Drain the noodles and rinse them with cold water to stop the cooking process and prevent them from sticking together.
The creamy sauce is what brings the casserole together, and it's straightforward to make. You will need condensed cream of mushroom soup, milk, and some seasoning. In a mixing bowl, mix the condensed cream of mushroom soup with milk until well combined. You can use a whisk to ensure the mixture is smooth and free of lumps. Add salt, pepper, and any other seasonings you prefer, and mix well.
Once you have prepared all the ingredients, you can start assembling the casserole. In the next section, we will guide you through the process of making the tuna casserole.