Chinese Sweet `N Sour Beef Recipe

• 1 pound top round steak, 1/2-3/4" thick
• 5 tbsp. vegetable oil
• 1 lg. onion, cut in wedges
• 1 can (8 1/2 ounce.) water chestnuts, liquid removed & sliced
• 1 green pepper, cut in squares
• 1 can (13 1/4 ounce.) pineapple chunks, undrained
• 2 tbsp. ketchup
• 1 tbsp. wine vinegar
• 2 tbsp. soy sauce
• 1/2 teaspoon sugar
• 1 tbsp. cornstarch
• 3 tbsp. cool water

Directions