I would just slice it across and leave the slice whole.about 1/2 to 3/4" thick. you can cube after the grilling is done.
I always take a ziplock bag ; lay my meat flat and season on both sides with lowyers seasoning ; garlic powder (not garlic salt) ; cavanders seasoning; black pepper.
pour zesty Italin salad dressing over the meat and place into the ziplock with another table spoon of dressing.let marinate overnight.

grill on a hot grill for only a couple min. on eack side. you want it pink in the middle.after cooking if you want cubes then you can cut it.

it is great!!!!![8D][8D][8D][8D]