1 1/2 pounds [680 g] lean ground beef 2/3 cup [160 mL] dry breadcrumbs 1 cup [250 mL] onion barbecue sauce, divided 1 egg, beaten 1 [8-ounce / 227-g] pack long grain and wild rice stuffing mix 1 [10-ounce / 284-g] pack frozen chopped spinach, thawed and well drained 1 large peeled carrot, shredded Preheat oven to 350°F [180°C]. Combine ground beef, breadcrumbs, half of onion barbecue sauce and beaten egg. Roll out mixture, between 2 sheets of waxed paper, into a 15 x 10-inch [37.5 x 25-cm] rectangle. Prepare stuffing mix according to package directions; mix in drained spinach and shredded carrot. Spread stuffing over meat mixture. Roll-up, starting at 10-inch [25-cm] side. Thighly wrap in plastic wrap; refrigerate for several hours or overnight. Unwrap, transfer onto a baking sheet and bake into a preheated oven for 1 hour. Brush meat loaf with remaining half of onion barbecue sauce. Bake for 15 minutes more, until glazed.