Cut pork into bite sized pieces and put into a 9x13 baking pan.
Drain pineapple tidbits and saving the juice.
Combine pineapple juice, vinegar, ketchup, salt, soya sauce, brown sugar and cornstarch.
Set the mixture aside.
Bake meat in a preheated oven at 350˙F until the meat is mostly browned.
Pour sauce mixture over the pork and cook until sauce is bubbly and thick.
Serve over rice.