If your Lasagna is watery, it can be due to serval factors: - You didn't cook your meat sauce long enough, so it wasn't thick enough when you added it to your casserole. - You made your Béchamel too thin (do not alter the recipe in the card below, and make sure to carefully measure all ingredients). - You didn't fully drain your Lasagna noodles before adding them to the casserole. - You didn't let your Lasagna rest for 15-20 minutes before slicing.