I'm making latkes for two kindergarten classes- have less than an hour and can't do any prep at home. The teachers suggested the box mix but said I could explore a way to do grated potatoes. I don't think there's any way to do fresh b/c I can't do any prepwork at home and don't have much time. I see recipes on line using frozen hash browns. Has anyone ever tried this? If so, how do they turn out? Any input would be much appreciated!