Vietnamese Glutinous Rice Balls (Chè Trôi Nước)

Name: Vietnamese Glutinous Rice Balls (Chè Trôi Nước)
Prep time: 45 min
Cook time: 15 min
Total time: 1 h
Cuisine: Vietnamese
Ingredients: 400g (2 cup) glutinous rice flour; 200g (1 cup) mung bean and 50g (1/2 cup) white sugar; (Optional) 1 tsp beetroot juice, 1 tsp pandan juice; 400ml (2 cup) water; 200-400g (1 to 2 cups) brown sugar depend on your taste; 3-5 ginger slices; Toppings (optional): peanut, roasted sesame, grated coconut, coconut milk...