Slow Cooker Cowboy Casserole *Hearty, warm, and wonderfully nostalgic, this slow cooker casserole brings together tender potatoes, seasoned beef, beans, and melted cheese in a way that feels like an old-fashioned family favorite—perfect for days when you want dinner to cook itself.* What You'll Need 1 pound lean ground beef 1 cup finely diced sweet yellow onions 1 tablespoon minced garlic 1 can dark red kidney beans, undrained (16 ounces) 1 can petite diced tomatoes with juice (14.5 ounces) 1 ca