In a microwave safe bowl, combine Rice Flour, Sugar, 1 3/4 cup Water, Vanilla and Salt and mix until smooth.
Heat in microwave on high for 2 minutes. Mixture should be sticky but still wet enough to stir. If not, add a little water at a time until it is a thick batter.
Add Corn Starch to a shallow pan and spread out evenly. Pour Mochi mixture over top, and combine into dough until smooth. Dough should be thick but pourable. Add up to 1/2 cup water until you reach the spoonable consistency.
Spoon dough into the center of the hot buttered waffle iron, filling about half the size of the waffle. Waffles that are smaller than the size of the iron are ok and cute too!
Add dough to middle of iron, and close.
Cook for 5 minutes or until reaching your browned preference.