Purple Yam Huat Kuih (Taro Root Steamed Cupcakes)

Steamed yam

• 300 g water
• 200 g yam (taro roots), cut into cubes (2 cm)

Starter

• 100 g water
• 1 tsp dried yeast powder
• 100 g plain flour

Batter

• 150 g caster sugar
• 300 g coconut milk
• 1 egg
• 250 g plain flour
• 2 tsp double action baking powder
• 800 g water