i doubt you can still sprout the grains after nixtamalizing, sprouting is the stage where the enzymes turn the starches into the malt sugars for the yeast. they do that with just water, so when you rinse off the lime you'll lose the sugars you wanted to begin with.
what you can easily do, is replace the grain sugars with white sugar and molasses. and then while you're at it bitter it with something that's not hops, like tea, pine, yarrow, mugwort, birch leaves, magic mushrooms etc.. woody flavours work well too (boil the shit out of some nice branches).
my best brew was coconut nectar (much like molasses), white sugar, sweetfern, jack pine, and white button and reishi mushrooms, with a british ale yeast.
without the molasses you end up with something more like a cider.
