1)If you dont have microwave, just take everything except pista in a sauce pan and heat it gently on stove. Once it is melted add in pista and continue with the remaining process.
2)Dont microwave on one go, first set timing to 1 min, if the chocolate is not melted in that timing, then pop again for 30 more sec. Dont over cook the chocolate.
3)My chocolate melted in 1 min itself.
4)You can add any nuts of your choice.
5)Lining the tray with foil or parchment helps in taking the fudge out of the tray easily.
6)This fudge should be stored in fridge always.