Preheat oven to 350°F. Spread sliced cabbage in a greased 9x13 inch baking dish. In a large skillet, cook ground beef and chopped onion until browned.

Drain excess grease. Add rice, chili powder, garlic powder, salt, and pepper to the skillet. Mix in crushed tomatoes and stir well. Layer meat mixture over the cabbage in the dish.

Combine tomato sauce, brown sugar, and vinegar. Pour evenly over the layered casserole. Cover with foil and bake for 90 minutes. Remove foil and let rest for 5-10 minutes before serving.