1 London Broil (any size)
2 bottles of marinade (I usually use Lawrey's but you can use any kind you want)
1) Pour one bottle into Slow cooker
2) Cut up the london broil into slices and put into crock pot
3) pour the other bottle of marianade into crock pot
4) cook on high for 2 hours
If you use more then one london broil (which you can do if you are feeding more people) then just double up on the bottles.