Preheat the oven to 350°F. Spread the cabbage across the bottom of a 9x13 inch dish. In a large skillet, over medium heat, cook the ground beef with the chopped onion.

Drain any grease from the pan and add the rice, chili powder, garlic powder, salt, and pepper to the skillet with the meat. Stir in crushed tomatoes and spread the mixture over the cabbage in the baking dish.

Mix together the tomato sauce, sugar, and vinegar, then pour over the meat and cabbage. Cover with foil and bake for 90 minutes. Uncover and let rest for 5-10 minutes before serving.