Sweet and Sour Beef and Cabbage

1 ½ pounds ground beef

½ cup chopped onion

½ cup chopped celery

½ cup chopped green bell pepper

2 tablespoons quick cooking oats

¾ teaspoon salt

¼ teaspoon garlic powder

⅛ teaspoon ground black pepper

1 medium head cabbage, cut into thin wedges

1 (15 ounce) can tomato sauce

¼ cup apple cider vinegar

3 tablespoons brown sugar

salt and ground black pepper to taste

Place a large skillet over medium heat; cook the ground beef, onion, celery, and green bell pepper in the hot skillet until the beef is completely browned, 7 to 10 minutes. Sprinkle the oats, 3/4 teaspoon salt, the garlic powder, and 1/8 teaspoon black pepper into the beef mixture. Arrange the cabbage wedges atop the beef mixture.

Stir the tomato sauce, cider vinegar, and brown sugar together in a bowl; season with salt and pepper. Pour over the cabbage and beef mixture. Place a cover on the skillet and simmer until the cabbage is tender, 15 to 20 minutes.