1Heat oven to 425°F. Place paper baking cup in each of 12 regular-size muffin cups.
2In medium bowl, stir muffin mix, milk, oil, eggs, grated lemon peel and lemon juice until blended. Divide batter evenly among muffin cups, filling each about two-thirds full. Sprinkle streusel from packet over batter.
3Bake 16 to 20 minutes or until golden brown and toothpick inserted in center comes out clean. Cool 5 minutes; remove from pan to cooling rack. Garnish with lemon peel strips. Serve warm.