Preheat the oven to 350°F (175°C).

Sauté onions and garlic in a large skillet over medium heat with a splash of olive oil until translucent, about 3-4 minutes.

Brown the ground beef in the same skillet, breaking it up as it cooks for about 5-7 minutes until rich brown.

Combine chopped cabbage, tomato sauce, oregano, salt, and pepper into the skillet. Stir well and let simmer for about five minutes.

Transfer the mixture to a greased baking dish and cover tightly with aluminum foil.

Bake in the preheated oven for 30-35 minutes. Let cool slightly before serving.