I split a big chunk of back strap, like butterfly it. Lay onions, mushrooms, and peppers (bell or jalapeño or both). I put a bbq dry rub inside and out on the meat. You can stuff with other veggies if you like.
Then I wrap in bacon and throw it on the grill/smoker at 350 for just long enough to crisp bacon.
Then I wrap in foil and leave it for a total time of 30 min off to the side of the direct heat.