1Heat oven to 350ºF. Beat egg in large bowl. Add all remaining meatloaf ingredients; mix well. Press mixture firmly in ungreased 8x4-inch loaf pan. Bake at 350ºF. for 40 minutes.
2Remove meatloaf from oven. Spread about 3 tablespoons sweet-and-sour sauce over loaf. Arrange bell pepper rings and pineapple slices over sauce. Brush with remaining tablespoon sauce.
3Return to oven; bake an additional 25 to 30 minutes or until meatloaf is thoroughly cooked in center and meat thermometer registers 160ºF. Cover with foil; let stand 5 minutes before cutting meatloaf into slices.