London Broil with Mushrooms

I decided to make London Broil again.

I don't know what exact cut of meat I used; The label said "London Broil".  But that refers to the way it's cooked, not the cut of meat itself.  Probably flank steak.

I marinated the meat for about 24 hours in Worcestershire sauce, and a grill seasoning called "molasses bacon".

Put it on the cast iron grill pan, put some raw mushrooms in the pan, and put it under the broiler.

It was under the broiler until the smoke alarm went off.  The top was a little too done for my liking, but it was still pink on the inside, making it "medium well".  

I prefer medium rare.