Umami Richness: Homemade σάλτσα στρειδιών for All Occasions

Ingredients

• 1 cup (240 ml) oyster extracts or oyster liquor (freshly shucked oysters)
• 1 tablespoon (15 ml) soy sauce
• 1 tablespoon (15 g) brown sugar
• ½ teaspoon (2 g) cornstarch
• ¼ cup (60 ml) water
• ½ teaspoon (3 g) salt
• A dash of rice vinegar (optional, for acidity)
• A sprinkle of sesame oil (for garnish, optional)
• Chopped green onions (for garnish, optional)