We'll drag the details out of him yet.......and nope, I didn't see spagetti sauce mentioned anywhere in the post but here goes my psychic recipe.
I'm guessing a quick 20 minute smoke on the shrimp. I'd go heavy on the smoke in that short a time.
take shrimp and add to heavy cilantro / garlic / italian seasoned spagetti sauce, (note to self - a white sauce would be to die for) layer shrimp / sauce, standard white cheeses in cast iron pan. Put pan in BBQ and bake for 20-30 minutes, more smoke! maybe a bit of pre-cooked pasta in there just for some texture.
I'd finish it under a broiler element in an oven at 350 to brown the top of the cheese and stiffen it up.
Dang, now I'M getting hungry.