1 1/2 lbs. pork tenderloin, 1" cubes
1 tbsp. shortening
1/3 c. water
1/2 c. brown sugar
3 tbsp. cornstarch
1/3 c. vinegar
1 (1 lb.) can pineapple chunks (reserve 1/2 c. liquid)
1/4 c. soy sauce
1 tsp. salt
1 green pepper, 1/2" squares
1 green onion, sliced thin
1 (8 oz.) can water chestnuts, sliced
2 tomatoes, cut in sixths

Brown pork; add water. Cover; simmer 40 minutes. Drain fat. Combine sugar and cornstarch. Add vinegar, pineapple liquid, soy sauce and salt. Add to meat. Cook until thickened, 5 minutes. Add pepper, onion, pineapple, chestnuts, and tomatoes. Cook 3 minutes. (Do not over cook.) Serve over rice.