Definitive chicken tacos

The Mexican chef, Saúl Montiel, that gave me these ideas was enlightening as well as funny. This is more "cooking from a list" than from a recipe. I personally eschew chicken breast meat because too dry and nasty, however, this recipe works because of the care it takes not to ruin the cutlets.

Ingredients

Chicken
1 chicken breast (or boneless thigh if you like)
½ lime, juiced
salt
garlic powder
onion powder
pepper
neutral oil
 
Avocado salsa
¼ white onion
½ serrano chili (remove seeds for less spicy)
1 lime, juiced
2 avocados
cilantro
water
salt
 
Assembly
neutral oil
tortillas
cheddar cheese, grated
tomato
queso fresco
romaine lettuce, finely shredded
crema (sour cream thinned with lemon juice and milk)

Method

Prepare chicken

Slice chicken breast in half laterally (to make 2, equally thin cutlets). Marinate in the ingredients listed for 20 minutes, but no longer than an hour because it will become too salty.

Avocado salsa

All ingredients into blender, purée until creamy. Set aside.

Cook chicken

Cook the chicken breast, 4 minutes per side in a skillet on medium high. Do not play with the cutlets (turning and turning, etc.). Rest for at least 4 minutes before cutting (in a later step). Do not empty or clean the skillet (unless you burned something)...

Tortillas

...but add a little more oil to heat up and slightly brown the torillas. Set aside in a warmer, between two towels, etc. There are other ways to prepare tortillas such as deep-frying them to crispy. You choose. I like both ways.

Assembly

Place 1 or 2 cooked tortillas in a taco-shell holder. I like using 2 tortillas because it's more robust as well as tasty for eating.

Cut chicken into perfect ¼" to ½" cubes and fill shells.

Add avocado salsa, grated cheddar, crumbled queso fresco and finely shredded romaine, Drizzle with crema. Serve.