In a sauce pan on high heat, add water, quinoa, sweet potato, salt and jalapeno.
Bring to a boil then reduce to a simmer.
Simmer for 20 minutes, (I kept the lid slightly ajar on the pan)
Remove from heat and fluff with a fork.
Heat tortillas on a hot griddle, then assemble tacos on hot tortillas: tomatilla sauce, quinoa & sweet potato, more tomatilla sauce, cabbage, mayonnaise dressing and cilantro garnish.
Additional hot sauce such as Tabasco if more spice is desired.