Gently combine the beef and chorizo in a large bowl until incorporated evenly. Add all other meatloaf ingredients and gently mix until combined. Don’t overwork the meat mixture.
Slice off the cap/stem of the poblano peppers and remove seeds. Slice off the bottom ½” of the peppers as well. Stuff the peppers with the cheese.
Line your loaf pan with plastic/saran wrap. Make sure there is several inches of overhang on all sides.
Take about 2/3 of your meatloaf mixture and place it in the loaf pan. Gently pat the mixture up all sides of the pan to the very top, and make sure the bottom is evenly distributed.
Place your poblanos into the meatloaf mixture in the loaf pan. Place the wider ends of the poblanos facing one another and gently push together.
Place the remaining meatloaf mixture on top of the poblanos, gently push down, and shape to cover the peppers.
Pull the wrap overhang over the meatloaf, and place it in the refrigerator for at least 1 hour, up to 4.
Fire up your smoker to 250℉ degrees.
Remove the meatloaf from refrigerator and pull back the plastic wrap.
Gently turn the meatloaf out onto a greased wire rack or perforated grill pan, lift off the loaf pan, and remove the wrap.
Place the pan on the smoker and let it roll undisturbed for about 45 min to 1 hour.
Baste your meatloaf with the red enchilada sauce every 45 minutes until the internal temperature reaches 165℉ degrees. Roughly 2-3 hours.
Remove from the smoker and let rest, covered, for at least 30 minutes to prevent the cheese from running out when sliced.