Preheat the oven to 400 degrees F. Grease a 3 quart (13x9) baking dish.
Spoon a thin layer of marinara sauce (about 3 to 4 tablespoons) into the bottom of the dish. Place about half of the ravioli in a single layer. Spread about half of the frozen kale on top of the ravioli. Add another layer of marinara sauce on top, followed by a layer of mozzarella cheese (about half of the cheese).
Repeat the process. Layer the rest of the ravioli, kale, marinara sauce, and cheese.
Cover tightly with foil. Bake for 25 to 30 minutes. Uncover and bake for 15 more minutes until the cheese has melted and is slightly browned on the edges.
Remove from the oven, serve hot, and enjoy!
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Notes
Marinara sauce: I love to make this with Rao's or Cucina Antica brands
Possible additions: cooked ground beef or sausage, white beans, sautéed zucchini, mushrooms, or onions
To make a freezer meal: follow steps up until baking; assemble in a freezer-to-oven safe container (like a foil lasagna pan or a glass baking dish that is specifically labeled as able to be transferred from freezer to oven), wrap with foil and then with plastic wrap, store in the freezer for up to 6 months
To bake from frozen: remove the plastic wrap but keep the foil on; bake with foil for 45 minutes, remove foil and bake uncovered for another 20 minutes