For a more authentic porridge, toss the jicama rice and almond milk in a blender-- and "pulse" it a couple times to thicken-up the texture, like that of a cooked breakfast cereal. You can skip this step to make the process faster, though.
In a small saucepot, add all the ingredients and heat over medium-high, until the porridge starts to bubble.
Cook until most of the moisture has been absorbed, and adjust the spices and sweetness, to taste. The jicama is naturally sweet, so you don't need to go overboard with the stevia. Unless of course, you want to.