Using a spoon, spread a thin layer of sauce over the bottom of the dish.
Place a single layer of ravioli on the sauce.
Place little dollops of ricotta over the ravioli. Then sprinkle Italian seasoning over the top.
Take ⅓ of the cheeses and cover the ravioli layer. Place another layer of ravioli on top of the cheese.
Spoon with another layer of sauce on top of the ravioli. Repeat with the ricotta, seasoning, Parmesan, and mozzarella cheese.
Repeat this one more time for a third layer.
Cover the dish with aluminum foil. Place in the oven for 30 minutes.
Remove the foil and then cook for an additional 20-25 minutes.
Remove it when it's golden and bubbly.
Notes
Choose any kind of ravioli you like. I went with beef, but all cheese or cheese and spinach would also taste great!
Pull the frozen ravioli out of the freezer 10-15 minutes before assembling the lasagna.
Go easy with the ricotta. A little goes a long way — the cheese will spread as it bakes, so don’t add too much. Otherwise the entire dish could come out watery.
Keep it covered for the first half of cooking to trap steam. That steam melts the cheese and ravioli together, allowing everything to cook all the way through without drying out.
For an even better finish, broil the dish for the last 1-2 minutes of cooking. The top will come out perfectly golden brown and bubbly.
Cover and refrigerate any leftovers for up to 3 days. Reheat it in the oven at 350 degrees F for the best texture, covered with foil to keep it from drying out. The microwave would also work, though I recommend covering the plate with a damp paper towel to retain most of the moisture.
This nutrition information is based on the exact products I used in this recipe. Brands and sizes of products could alter exact nutrition and should always be calculated independently.