Luke McCowan is showing he is worth more than just being a Celtic fan living the dream after a string of impressive cameo performances since joining the Bhoys. The 26-year-old has now made four substitute appearances for the Bhoys, scoring against Heart of Midlothian and playing a significant role in Adam Idah’s sixth at St Johnstone the weekend before last. Drafted in from the bench in Dingwall on Sunday, Luke McCowan was labelled ‘outstanding’ by Celtic boss Brendan Rodgers alongside Paulo Bernardo for their part in helping the Bhoys over the line against Ross County. Paying tribute to their…