Che Hat Sen

Name: Authentic Che Hat Sen Recipe
Prep time: 20 min
Cook time: 60 min
Yield: 4
Cuisine: Vietnam
Ingredients: 200g dried lotus seeds; 150g longan, dried or fresh; 400ml coconut milk; 150g granulated sugar (or to taste); 1/4 teaspoon salt; 5 liters water; 1 tablespoon tapioca starch (optional, for thickening); 2 tablespoons water (for mixing with tapioca starch)