Preheat oven to 350 degrees.
In a large bowl mix together the panko and milk until it forms a paste.
Add in the ground turkey, eggs, seasonings, worcestershire sauce, feta cheese, zucchini, and 1/2 cup of the marinara.
Mix until all of the ingredients are combined.
Place on a baking pan, sprayed with cooking spray, and form into a loaf.
Spread the last 1/2 cup of sauce over the top.
Cook for 1 hour 15 minutes or until the internal temperature reaches 160 degrees.
Let sit for 5 minutes, cut into 8 slices, and serve or store in the refrigerator or freezer.