Is it possible to turn zip roms into fastboot flashable img topic

So apperently
I accidently screw up while I tried to flash a new rom when I do a wipe

now my phone has TWRP 2.7 recovery and empty system and no way to us adb to push it since I couldn't get adb to work

is there anyway to turn zip roms into a img and flash it through fastboot using

fastboot flash system *.img

Please answer quick

Thanks