Combine coriander and cumin in a small skillet over medium heat; cook 1 1/2 minutes or until toasted. Combine coriander mixture, black pepper, red pepper, and cinnamon in a small bowl. Place spice mixture in a spice grinder; process until finely ground (you can also crush with a mortar and pestle). Combine 1/2 teaspoon spice mixture, yogurt, 1 tablespoon oil, mint, and parsley in a small bowl, stirring with a whisk.
Partially peel eggplant lengthwise with a vegetable peeler, leaving long stripes. Cut eggplant crosswise into 1/2-inch-thick slices; lightly coat with cooking spray. Sprinkle evenly with remaining spice mixture, pressing to adhere. Arrange eggplant on grill rack coated with cooking spray; grill 5 minutes on each side or until just tender. Place eggplant on a platter; cool to room temperature. Spread yogurt mixture evenly over eggplant. Cover with foil, and let stand at room temperature at least 1 hour. Drizzle with remaining 1 tablespoon oil. Sprinkle with salt.
MyRecipes is working with Let's Move!, the Partnership for a Healthier America, and USDA's MyPlate to give anyone looking for healthier options access to a trove of recipes that will help them create healthy, tasty plates. For more information about creating a healthy plate, visit www.choosemyplate.gov.