Break entire package of pork into bite-size pieces, discarding banana leaf; heat a large skillet over med-high and sear pieces 3-5 min, turning half-way through until meat is crisped and hot. Slice 4 buns in half; spread each bun with 2 tbsp honey mustard; divide pork and pickles to buns then sprinkle each with 1 slice cheese; heat 2 tbsp oil (or butter) in a large skillet over med; cook sandwiches 2 min each side until toasty, then cover and warm 1-2 min until melty.