I presume you have an external drive where the M backups are?
Use the method in the link above...I did recently- works a treat.
Basically connect/leave connected the external disk then hold the Alt/Option key while starting the machine up - you will the see a list of options from which you can boot. User the TM disk , this will start the ML recovery partition that is now also backed up to TM.
The rest is pretty self explanatory - just choose the restore entire system option.
will take a few hours, depending on size and speed of USB disk