Heat oven to 350. grease bottom only of 9 x 5 inch loaf pan with shortening or cooking spray. In large bowl, stir all bread ingredients except blueberries until blended. Fold in blueberries. Pour into pan. Bake 50 to 60 minutes or until toothpick inserted in center comes out clean. Cool 10 minutes; loosen loaf from sides of pan. Remove from pan to cooling rack. Cool completely, about 45 minutes. In small bowl, mix powdered sugar and orange juice until smooth and thin enough to drizzle. Drizzle glaze over bread. Sprinkle with additional orange peel if desired.