Preheat the oven to 400-degrees.
Place the pork into a baking dish. Squeeze the juice from one lime over the pork and allow the meat to sit at room temperature for 15 minutes.
Season the lime marinated pork with salt, pepper, and the package of taco seasoning. Drizzle the seasoned pork with avocado oil.
Roast the pork tenderloin in the preheated oven for 30 minutes.
While the pork is roasting, combine the refried beans, cilantro paste, and fire roasted chiles. Stir well.
Remove the pork from the oven and allow the pork to sit for 5-10 minutes before slicing.
Layer the taco ingredients (bean mixture, pork, avocado slices, salsa, and Monterey Jack cheese) into the flour tortillas and top with fresh cilantro leaves and lime wedges if desired.
For easier filling of the tacos, turn a muffin tin upside down and place the flour tortillas between the spaces of the muffin wells.