Preheat oven to 375 degrees F.

In a blender mix the lemon juice, lime juice, garlic, cilantro, salt, and cumin, until well combined and a paste forms. Place the pork in a large roasting pan and rub the paste all over pork. Place the roasting pan in the oven and roast the pork for 4 hours. Remove the pork and let sit for 10 minutes. Once a bit cooled, using 2 forks, pull the pork into shreds.

Heat the tortillas on stove for 30 seconds each side. Spread mustard on each warmed tortilla, add some pulled pork, a slice of ham, a slice of Swiss cheese, some pickles, lettuce, and a slice of tomato. Wrap up the tortilla and serve.