Preheat broiler. Scrub potatoes. Halve lengthwise; cut in 1/4-inch slices. Place on greased rack of unheated broiler pan. In bowl combine sugar, salt, cumin, and chili pepper. Coat potatoes with cooking spray; sprinkle both sides with half the spice mixture. Broil 4 inches from heat 10 minutes or until tender; turn once midway through cooking.
Meanwhile, rinse salmon; pat dry. Sprinkle with remaining spice. In skillet cook fish in 1 tablespoon hot olive oil over medium heat 8 to 12 minutes or until fish flakes when tested with fork; turn once midway through cooking. Add cilantro. Serves 4.