Chinese spareribs in black bean garlic sauce

Ingredients:

vegetable oil
pork spare ribs, cut to 1-inch pieces
1 teaspoon chopped ginger
3 cloves garlic chopped
1 medium-sized leek, thinly sliced
White sesame seeds for garnish, optional
Thinly sliced scallions optional

Sauce:

3 tablespoons spicy black bean sauce (or 2 tablespoons black bean sauce with 1/2 tablespoon chili oil)
2 tablespoons dark soy sauce
1 tablespoon Chinese rice wine
1 teaspoon brown sugar
1 teaspoon cornstarch
1/2 cup water

Method:

Mix together ingredients for the sauce. Set aside.

In a wok or frying pan, heat oil over medium-high heat. Add spare ribs and stir-fry until brown on all sides, about 4 to 5 minutes. Add ginger, garlic, and leeks and cook until aromatic, about 1 minute. Pour in sauce mixture. Cover with a lid and simmer for about 10 minutes. Sauce should be reduced enough to coat the spare ribs. Transfer to serving plate, garnish with optional sesame seeds and scallions, and serve with rice.