in a small mixing bowl, stir together ketchup, brown sugar, 1 tbsp pineapple juice, 1 tbsp apple cider vinegar. set aside.
in a medium mixing bowl, combine ground pork with scallions, 1/2 tsp salt, 1/2 tsp pepper. Make 8 patties.
lightly spray a grill pan (or use the real grill) with cooking spray and heat over medium high heat. add the patties to pan. Cook for approximately 6 minutes or until no longer pink. Flipping halfway through. set aside.
using same grill pan, add the pineapple slices and cook about 2-3 minutes, flipping halfway through. place pineapple on top of patties.
in a small mixing bowl, combine cabbage, 2 tbsp pineapple juice, 1 tbsp vinegar, 1/4 tsp salt, 1/4 tsp pepper.
assemble the sliders! brush the top and bottom with ketchup mixture, place pork and pineapple on top of bottom bun, add cabbage. ENJOY!!