Preheat oven to 350 degrees F.
Using a food processor with the grinder attachment, grind mushroom and eggplant together. In a large bowl, combine mushroom mixture with all remaining ingredients, except cooking spray, until just mixed; be careful not to overwork.
Spray a nonstick 9 by 5 by 3-inch loaf pan once with canola oil cooking spray. With clean hands, pat the turkey mixture into the pan. Bake for 45 minutes or until internal temperature reaches 160 degrees F.