Stir-fried Beef with Pineapple - Serves 4-6

From: Vietnamese Cooking made easy (modified)

Ingredients:
1 lb sirloin or topside steak, very thinly sliced across the grain
3 cloves garlic, minced
1 tablespoon fish sauce
1/2 teaspoon freshly ground black pepper
3 tablespoons oil
1 large yellow onion, cut into wedges
1 large red bell pepper, deseeded and cubed
2 cups small pineapple chunks (use fresh if possible)
1 tablespoon oyster sauce
2 teaspoons sugar
2 teaspoons cornstarch, dissolved in 1/2 cup beef stock or water

1) Combine the beef slices, garlic, 1/2 tablespoon of the fish sauce and black pepper in a large bowl, and mix with your fingers until the beef is well coated. Set aside for at least 10 minutes to marinate.
2) Heat 1 tablespoon of the oil in a wok or skillet over high heat until very hot. Stir-fry the marinated beef until it changes color, about 1 minute. Remove from the pan and set aside.
3) Heat the remaining oil in the wok or skillet over high heat until hot, stir-fry the onion and bell pepper for about 1 minute until tender, then add the pineapple and stir-fry for 1 to 2 more minutes, seasoning with the remaining fish sauce, oyster sauce and sugar. Return the beef to the pan and mix well. Pour in the cornstarch mixture and stir-fry until the sauce is thickened. Remove from the heat.
4) Transfer to a serving platter and serve immediately.

Serves 4 to 6