1In a bowl,combine flour,sugar,baking powder,& salt.
Stir in blueberries,orange peel.
In another bowl,beat eggs,add milk & oil.Stir into dry ingredients just until moistened.
Pour into a 9"x13" baking pan.
Bake in a preheated 350 oven for 1 hour or until a toothpick inserted near center comes out clean.
Cool in pan 10 min. Remove from pan to a wire rack to cool completely. (can leave in pan)