I cooked it like white rice once it was sprouted like this with equal parts rice and water. It was one cup sprouted into just under 2 cups size. It was a bit sweeter than normal and very creamy. I guess it makes sense it was sweet, I essentially malted it.
The way I sprout quinoa is by soaking it in water for a little bit then letting the water drain and keeping the quinoa somewhere moderately warm and moist enough that it doesn’t dry out (sometimes I just put it in a new batch of water and it will sprout even in the water).
It looks like sprouting brown rice is similar, here is a recipe: https://www.food.com/recipe/how-to-sprout-brown-rice-515843
Basically you soak the rice in a warm-ish place for 12 hours, then dump out the water and replace it while rinsing the rice thoroughly. You do this a couple times a day. After a couple days you should see the rice sprouting.