In large bowl, combine flour, sugar, poppy seed and baking powder; set aside.
In small bowl, combine milk, margarine, Egg Beaters and lemon peel.
Stir into flour mixture just until moistened.
Spoon batter into 12 lightly greased 2 1/2-inch muffin-pan cups.
Bake at 400°F for 20 to 22 minutes or until lightly browned.