1. In a large mixing bowl, combine flour, sugar, salt, and yeast for the bread dough.
2. Add warm water and vegetable oil, mix until a dough forms.
3. Knead the dough for about 10 minutes until smooth and elastic.
4. Place the dough in a greased bowl, cover, and let rise for 1 hour or until doubled in size.
5. Preheat the oven to 375°F (190°C).
6. Punch down the dough and divide it into 8 equal pieces. Shape each piece into a roll and place on a baking sheet.
7. For the topping, mix rice flour, sugar, salt, warm water, and yeast in a bowl. Let it sit for 5 minutes.
8. Spread the topping mixture over each roll.
9. Bake for 25 minutes or until the rolls are golden brown and the topping is crackled.
10. Let cool on a wire rack before serving.