Chinese Sweet 'N Sour Beef - cooking recipe

Ingredients

1 lb. top round steak (1/2 to 3/4-inch thick) or use 1 lb. lean boneless pork
Natural meat tenderizer
5 Tbsp. vegetable oil
1 large onion, cut in thick wedges
1 c. water chestnuts (8 1/2 oz.), drained and sliced
1 green pepper, cut in squares
1 (13 1/4 oz.) can pineapple chunks (undrained)
2 Tbsp. ketchup
1 Tbsp. wine vinegar
2 Tbsp. soy sauce
1/2 tsp. sugar
1 Tbsp. cornstarch
3 Tbsp. cold water
2 firm, ripe tomatoes, cut in wedges
hot cooked rice

Preparation

Trim fat from meat and tenderize.
Cut into thin slices on diagonal across grain.
Heat 3 tablespoons oil in a large skillet until hot.
Quickly brown beef, over high heat, stirring rapidly, for 3 to 4 minutes.
Remove to platter with drippings.