Mushroom, onion, & swiss Steak Fajitas

Walking through @Sam'sclub trying to come up with dinner ideas can be dangerous.  This past Sunday the wife, kids & I visited @ToysRUS & @Samsclub with near perfect behavior in two stores i wasn't going to risk the third, a grocery store.  The multiple options and pkg size can make one meal shopping intimidating but I like to buy items that I can use for multiple meals.  I bought: 4lbs Skirt steak, 1 pkg of 4 portabella mushrooms &, 2lbs @JarlsbergUSA cheese I used half of the ingredients for the fajitas. 

1 pkg medium burrito shells
2lbs skirt steak
2 garlic bulbs
1 large yellow onion sliced 1/4" keeping ring chunks in tact 
2 portabella mushrooms
olive oil
Lawry's Season salt
fresh ground pepper
1lb shredded jarlsberg cheese (next time 2/3rd jarl chz & 1/3 Gorgonzola=creamy w/a bite)

season steak w/season salt & pepper refrigerate until 30 minutes before placing on grill
pre heat @webergrills kettle grill for 30 minutes
remove tops of garlic bulbs  paint w/olive oil roast on indirect heat for 1 hour rotating @ 30 minutes
remove garlic from grill make sure cloves push right out and are smearable set aside
paint portabella mushrooms w/olive oil brown both sides & roast for 10 minutes until soft
while roasting portabella on indirect heat add steak and onions to grill with steak going to hot spot
searing both on each side for 5 minutes. Oops, dont forget to paint olive oil on onions!
remove all from grill slice steak and mushrooms, break rings of onion lose
(skirt steak more tender if sliced against grain)

with warmed shells smeared w/ a garlic clove or two create your fajita
eat and enjoy