Step 1

Cover a large griddle with aluminum foil and preheat to medium-high.

Step 2

Cook the garlic, serrano peppers, and tomatillos on the hot griddle until toasted and blackened, turning occasionally, about 5 minutes for the garlic, 10 minutes for the peppers, and 15 minutes for the tomatillos. Remove to a bowl and allow to cool.

Step 3

Heat oil in a small, deep skillet to 350 degrees F (175 degrees C). Using kitchen tongs, fry the tortillas individually, turning them once. They shouldn't be in the hot oil for more than 5 seconds per side. Remove excess oil with paper towels and keep warm. Remember that the hotter the oil, the less that the tortillas will absorb.

Step 4

Place the toasted garlic, serrano peppers, tomatillos, and the water in a blender and blend until smooth; pour into a saucepan over medium heat and bring to a boil. Dissolve the chicken bouillon into the mixture, reduce heat to medium-low, and cook at a simmer until slightly thickened, about 10 minutes. The sauce shouldn't be too thick.

Step 5

Soak three tortillas in the sauce, one at a time, for a few seconds, fill them with shredded chicken, sprinkle the meat with some of the sauce, roll them and place them seam side down on a pasta bowl. Spoon a generous amount of sauce over them and top them with lettuce, cilantro, crema, and cotija cheese. Pour a little more sauce over the whole thing if desired. Repeat the procedure twice more. Serve immediately.