Place frozen chicken breasts in crock pot, sprinkle taco seasoning, a couple of sprigs of cilantro (depending on how much you like) onions and salsa on top of chicken. Add water, set to low and cover crock pot allow to cook for minimum 6-8 hours for a more tender, easier to shred chicken.
Warm tortilla's on a stove top non stick skillet
Fill tortilla with a couple spoonfuls of chicken,
Top with Shredded cheese, Lettuce (you can add diced tomato's but I think the tomato in the salsa is enough) and a bit of cilantro
Drizzle with Ranch Dressing
Serve with rice, for a more authentic tasting rice place a few sprigs of cilantro in rice pot as the rice steams)