Mix the spinach with the ricotta, egg, half the Parmesan, nutmeg, salt and pepper.
Mix the passata with the crushed garlic and 100 ml water and season; pour a third into the bottom of a baking dish.
Fill the tubes with the filling (with a small spoon or piping bag) and lay them side by side on the sauce.
Pour over the rest of the sauce (it should cover the pasta completely) and sprinkle with the mozzarella and remaining Parmesan.
Bake covered with foil at 190 °C for 30 minutes, then uncovered for 15 minutes; packed in portions it keeps 3-4 days; it heats through in the microwave in 1.5-2 minutes (and can be eaten cold).
A Receptnaptár original recipe. Calories and protein are estimated.