Just imagine, there were amoraim who didn't think that we should merely be able to eat rice--rather they thought that it should actually be on the seder plate:
"What are the two dishes? --Said R. Huna: Beet and rice. Raba used to be particular for beet and rice, since it had [thus] issued from the mouth of R. Huna. R. Ashi said: From R. Huna you may infer that none pay heed to the following [ruling] of R. Johanan b. Nuri. For it was taught, R. Johanan b. Nuri said: Rice is a species of corn and karet is incurred for [eating it in] its leavened state, and a man discharges his duty with it on Passover.And just in case, you get confused, I repeat what R. Ashi said: none should pay attention to R. Johanan b. Nuri who said that rice is a species of corn and you get karet for eating it leavened.