1 cup all-purpose flour
1 teaspoon baking powder
1 teaspoon baking soda
1 teaspoon salt
1/2 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
3/4 cup orange juice
1/2 cup lemon juice
1/2 cup lemon zest
Preheat oven to 350 degrees F (175 degrees C).
In a medium bowl, stir together flour, baking powder, soda, salt, cinnamon, nutmeg and orange juice. Spread the mixture onto a 9x13 inch baking dish. Sprinkle slices of lemon juice over the top. Season with lemon zest.
Bake in preheated oven for 15 to 20 minutes, until crust is golden brown.