Steam pumpkin until fork-tender, then mash/puree with a fork. In a bowl, combine pumpkin puree, glutinous rice flour, tapioca flour, and a pinch of salt. Knead by hand until the dough is smooth and no longer sticky. If sticky, add a touch more glutinous rice flour; if dry, add 1–2 tsp water. Pinch off a small piece of dough and tint it green for stems. Roll the yellow dough into small balls. Use the edge of a spatula (or toothpick) to press light grooves so they resemble mini pumpkins.
Cook the coconut milk sauce. Finish the pumpkin shapes by lightly pressing grooves and adding a tiny bit of green dough as the stem. In a saucepan, add coconut milk, water, sugar, and a pinch of salt. Stir well. Heat on low to medium-low until it gently simmers; do not boil (to prevent splitting). Keep warm.Optional: Add a knotted pandan leaf for extra aroma, remove before serving.
Cook the pumpkin “balls” & sago; assemble. Bring a pot of water to a rolling boil. Add the shaped pumpkin pieces. Stir once to prevent sticking. Cook until they float, then give them 1–2 more minutes for a fully cooked, bouncy center. In a separate pot, boil water and cook the sago pearls until mostly translucent with a tiny white dot. Drain, rinse under cold water, and soak in cold water to keep them separate. If you want colored pearls, toss the drained pearls with a drop of coloring or pandan water.
To serve, place pumpkin “mini pumpkins” in a bowl, add some sago pearls, and ladle over the warm coconut milk sauce. Serve warm or chill everything and serve cold.
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Notes
If you want to change the pumpkin to other ingredients like purple yam or sweet potato, you need to adjust the water. Purple yam has less water than pumpkin, so you might need more water to reach the same consistency as with pumpkin.
Taste-test the coconut milk, adjust the sugar according to your preference.
You can shape the dough into small, round balls, just like Bua Loy in Thailand. To make it more attractive, add other colored ingredients such as pandan extract, sweet potato, or purple yam.
Remember to stir the dough gently while cooking, so the shaped dough stay intact.