Combine rice, onion, jicama, olives, and peppers in large bowl; set aside. Heat 1 tablespoon oil in large skillet over medium heat. Add ham; cook 2 to 3 minutes stirring constantly. Add to rice mixture. Combine remaining oil, vinegar, garlic, cumin, chili powder, salt and pepper in small jar with lid. Shake to blend. Drizzle dressing over salad.