Teriyaki sauce - chinese grandma

Ingredients

• 1/2 cup soy sauce
• 1/4 cup sugar
• 1/4 cup sake (Japanese rice wine, pronounced sah-kay)
• 1/2 cup mirin (sweet rice wine – can substitute with 1/2 cup sake plus 2 tablespoons sugar)
• 1 clove garlic, crushed
• 1 slice ginger, smashed
• 1 tablespoon water
• 1 tablespoon cornstarch