Preheat your oven to 191 °C (190 °C) and lightly grease an 8x11-inch or 9x13-inch baking dish with cooking spray.

Spread a thin layer of marinara sauce (about 120 ml) across the bottom of the prepared baking dish.

Arrange half of the frozen dumplings in a single, even layer over the sauce. Do not thaw them beforehand.

Pour half of the remaining marinara sauce over the dumplings, then sprinkle with 240 ml of mozzarella cheese and half of the Italian seasoning.

Repeat the layers by adding the remaining frozen dumplings, the rest of the marinara sauce, the remaining 240 ml of mozzarella, the parmesan cheese, and the rest of the Italian seasoning.

Cover the baking dish tightly with aluminum foil and bake for 20 minutes.

Carefully remove the foil and bake uncovered for an additional 10 minutes, or until the cheese is melted, bubbly, and golden brown around the edges.

Remove from the oven, let it cool and set for 5 minutes, then garnish with fresh chopped basil before slicing and serving.