This is a super easy manicotti dish that is fast and simple. I sliced a piece out of the baking dish so that you could easily see the filling. The filling is a spinach, ricotta, and Italian cheese blend. The sauce is a delicious vegetable marinara sauce. This is a great hearty vegetarian dish. This dish is made in a casserole style, so it resembles a lasagna. For this dish, I do not precook the noodles, I just add extra sauce, and extra water in the sauce to cook the noodles. I know that there are no boil manicotti noodles, but they do not seem to exist in my part of the world. This recipe will produce a noodle that is al-dente. I find it very delicious. If you like very soft noodles, you should pre-cook the noodles before filling. If you want a more traditional style manicotti, you could precook the noodles and use about half the amount of marinara sauce. However, I love the extra sauce to go with the garlic bread!