Preheat your oven to 375°F (190°C).
In a large skillet, cook the ground beef over medium heat until browned. Drain any excess fat.
Add the marinara sauce to the skillet and stir to combine. Simmer for 5 minutes.
In a mixing bowl, combine the ricotta cheese, salt, pepper, and dried oregano.
Spread a thin layer of the meat sauce on the bottom of a baking dish.
Place a layer of gluten-free lasagna noodles on top of the sauce.
Spread a layer of the ricotta mixture over the noodles, followed by a layer of shredded mozzarella cheese.
Repeat the layers until all ingredients are used, finishing with a layer of meat sauce and a generous topping of shredded mozzarella and grated Parmesan cheese.
Cover the baking dish with aluminum foil and bake for 25 minutes.
Remove the foil and bake for an additional 20 minutes, or until the cheese is bubbly and golden brown.
Let the lasagna rest for 10 minutes before serving.