In a small bowl, dissolve the yeast in 1/2 cup (120 ml) of the warm water. Let it sit for about 10 minutes, or until it becomes frothy.
In a large bowl, combine the cornmeal, rice flour, sugar, and salt. Mix well.
Add the frothy yeast mixture, remaining warm water, and warm milk to the dry ingredients. Stir to combine until you have a smooth batter.
Cover the bowl with a clean cloth and let the batter rest in a warm place for about 1-2 hours, or until it doubles in size and becomes bubbly.
Grease small bowls or ramekins with vegetable oil. These will be used to steam the Ablo.
Pour the batter into the greased bowls or ramekins, filling them about three-quarters full.
Place the bowls or ramekins in a steamer. Cover and steam over medium heat for about 20-25 minutes, or until the Ablo is firm and a toothpick inserted into the center comes out clean.
Remove the Ablo from the steamer and let them cool slightly.
Carefully remove the Ablo from the bowls or ramekins and transfer to a serving plate.
Enjoy your meal!