Below is my doctored recipe for Zucchini Muffins.
Like others have mentioned, you can just pick a regular recipe, and doctor it up a bit.
Applesauce can be used successfully as a substitute for oil in recipes.  The trick is not to replace all the oil; just do part of it.  The recipe here originally called for a cup of oil.  (Yowza!  That’s a lot of fat.)  I used one cup less two Tbsp of applesauce, and finished off the cup with oil.
Similarly, I tend to be careful about replacing all of the eggs in a recipe with egg whites.  The yolk contains some fat and other properties that, frankly, I think the recipe needs.  Looking at the replacement below, I have the feeling that the original called for 3 eggs, since I replaced it with one whole egg and 4 egg whites.  That’s a lot of eggs.  Sometimes, I just go ahead and use the whole eggs instead, and say the hell with the extra fat from the yolks.
Also, I’m not a huge fan of using all whole wheat.  Since this is for a fairly robust and spicy muffin, though, I find it works fine to replace half of the flour with whole wheat pastry flour.  This probably wouldn’t be as successful with a muffin that you expect to be light and white.  If you’re looking for a whiter muffin,  you may want to try white whole wheat flour.
Zucchini Muffins
3 cups flour *					1 tsp nutmeg	
2 cups shredded unpeeled zucchini		1 tsp cloves
1 1/2 cups sugar				1 tsp cinnamon
1 tsp salt					1/2 tsp ginger
1 tsp baking powder				1 cup (less 2 Tbsp) applesauce
3/4 tsp baking soda				2 Tbsp vegetable oil
1 cup raisins					1 whole egg
3/4 cup chopped walnuts			4 egg whites
- or 1 1/2 cups all purpose flour, 1 1/2 cups whole wheat pastry flour
Preheat oven to 350 degrees.
In a large bowl, combine flour, zucchini, sugar, salt, baking powder, soda, raisins, nuts, and spices.
In a small bowl, combine the applesauce, oil, and eggs.  Pour the applesauce mixture over the dry ingredients and stir well until entirely mixed.
Spray 2 regular sized muffin tins with cooking oil spray.  Put 1/4 cup of batter in each muffin cup.  Fill any empty cups in the tins halfway full of water.
Bake in a preheated 350 degree oven for 25 to 30 minutes.
Makes 20 muffins.