Mongolian Beef

INGREDIENTS

• 1/4 cup chicken stock
• 1 1/2 tablespoons cornstarch
• 3 tablespoons hot chili oil
• 2 tablespoons hoisin sauce
• 1 tablespoon oyster sauce
• 1 tablespoon dry sherry
• 2 teaspoons sugar
• 2 teaspoons soy sauce
• 2 teaspoons crushed red pepper flakes
• 1 pound flank steak, thinly sliced (see Cook's Note)
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• 2 tablespoons peanut oil
• 2 tablespoons chopped garlic
• 1 bunch Swiss chard - rinsed, stems removed and cut into 1/2 inch slices
• 2 green onions, cut into thin slivers about 2 inches long
• 1 teaspoon salt
• 1/4 teaspoon black pepper