Crispy orange-glazed beef

Ingredients

• Oil for deep-frying
• 1 cup (250 ml) unbleached all-purpose flour
• 1/2 cup (125 ml) tapioca starch or cornstarch
• 1 tablespoon (15 ml) sugar
• 1/2 teaspoon (2.5 ml) salt
• 3/4 cup (180 ml) lager or pale ale
• 1/2 cup (125 ml) water
• 1 lb (454 g) cold leftover roast beef, cut into strips
• 1/4 cup (60 ml) tapioca starch or cornstarch
• 1/4 cup (60 ml) soy sauce
• 2 teaspoons (10 ml) tapioca starch
• 1/2 cup (125 ml) sugar
• 2 tablespoons (30 ml) rice vinegar
• 3 cloves garlic, finely chopped
• Grated zest of 2 oranges
• 1 tablespoon (15 ml) chopped fresh ginger
• 1/4 teaspoon (1 ml) hot pepper flakes or cayenne
• Juice of 2 oranges