– Cut the rolls in half lengthwise, and remove some of the crumbs from the middle of the bread.
– Heat a griddle over medium-high heat. When hot, place the rolls upside down to warm. This will take about 1 minute, then remove.
– Spread mayonnaise on one side of each roll and beans on the other.
– Divide the carnitas between the two bottom sides of the rolls. Top the meat with the shredded cabbage, tomato, and onion slices. Finally, place the tops of the bread on the sandwiches.