This slow cooker combination of ground beef and cabbage makes an excellent everyday meal. It's similar to an unstuffed cabbage roll skillet, but it's even easier. All you have to do is layer all of the ingredients in the slow cooker and then set it and forget it A bag of shredded slaw mix cuts down on prep time, but about 5 to 6 cups of freshly shredded cabbage is a fine alternative. With extra-lean ground beef, there is no need to pre-brown the meat for this recipe. If your ground beef isn't lean, brown it briefly in a skillet to render the fat and then drain it before you add it to the slow cooker. Feel free to replace the jar of spaghetti sauce with a favorite tomato sauce mixture (see the notes below the recipe). Additionally, you may choose to cook the rice separatelyor omit it altogether and serve the cooked beef and cabbage mixture with mashed potatoes or noodles. Steamed broccoli, green beans, or greens complement this dish nicely.