Preheat the oven:

• Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish.

Cook the cabbage:

• In a large pot, bring a few inches of water to a boil. Add the shredded cabbage and cook for about 5 minutes, just until it begins to soften. Drain the cabbage well and set aside.

Cook the beef mixture:

• In a large skillet, heat olive oil over medium heat. Add the ground beef and diced onion. Cook until the beef is browned and the onion is soft, about 7-10 minutes. Drain any excess fat.
• Add the garlic powder, onion powder, diced tomatoes, and tomato sauce to the beef mixture. Stir to combine, and cook for another 5 minutes to heat through. Season with salt and pepper to taste.

Assemble the casserole:

• In the prepared baking dish, layer the cooked cabbage, followed by the beef mixture. If using rice, sprinkle it over the beef mixture for added texture.
• Top with shredded cheddar cheese and breadcrumbs (if using).

Bake the casserole:

• Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly and the top is golden brown.

Serve and enjoy:

• Let the casserole cool for a few minutes before slicing and serving. Enjoy this comforting and delicious dish!