Preheat oven to 350 degrees.
Lightly oil and flour baking dish.
Peel, core and grate Granny Smith apples, and also peel and grate zucchini. Should have 2 cups of each.
In large mixing bowl, beat eggs and sugar until smooth.
Slowly add oil to sugar and egg mixture while mixing thoroughly.
Add remaining dry ingredients (spices, salt, baking soda and flour).
Mix grated apple and zucchini into mixture.
Add nuts and mix into batter.
Pour batter into baking dish. Gently evenly spread batter.
Arrange apple slices as desired onto top of batter.
Bake for 45 minutes, or until toothpick comes out clean.
Server warm or cooled, and enjoy!