In a large skillet, brown pork steak in shortening. Sprinkle with paprika. Brown well.
Cover and cook about 20-25 minutes, or until tender, stirring occasionally.
In a medium bowl combine brown sugar, corn starch and salt. Gradually add reserved pineapple liquid, vinegar, water, soy sauce and Worcestershire sauce. Blend until smooth. Gradually add to the skillet with the pork.
Cook over low heat until thick, stirring constantly. Stir in green pepper and pineapple.
Cover and simmer over low heat for 6-8 minutes or until vegetables are tender.
Serve over hot cooked rice.