Mix first 5 ingredients, 3 teaspoons oil, and 1/4 teaspoon cumin in small bowl.
Sprinkle lamb with remaining 1/4 teaspoon cumin, salt, and pepper. Heat 2 teaspoons oil in medium nonstick skillet over medium-high heat. Add lamb; cook to desired doneness, about 5 minutes per side for medium. Top with relish and serve.