Tacos de Lengua (Cow Tongue)

1 cow tongue (about 3.5 lbs)
2 onions, quartered
1 head garlic, cloves crushed
6-7 bay leaves
1 tsp. mexican oregano
1 tbsp. peppercorns
1 tbsp. salt
2 tsp. comino

2 tomatoes, diced
1/2 onion, diced
1 serrano, minced
2 cloves garlic, minced

Rinse the tongue and place in a crockpot*. Add onions, garlic, bay leaves, oregano, peppercorns, salt, and comino. Cover with water and cook on low, about 6 hours.

Remove the tongue from the broth and set on a cutting board to cool for a moment. While its still warm peel off the skin. (Its easiest to start peeling at the back of the tongue and tug forward) Cut away the base of the tongue where it was attached to the mouth (this part is tough).

Slice the tongue crossways in 1/2" slices, then dice it. Sautee the tomatoes, onion, serrano, and garlic in a little oil until cooked through and fragrant. Add the cubed tongue and 1/2-1c of the cooking liquid. Season to taste with salt, pepper, comino, and chili powder. Simmer briefly to reduce the liquid.

Serve in corn tortillas with onion, cilantro, lime and fresh salsa.

*Alternately you can make this in a stockpot. Bring the water to a boil, add the tongue, onions, garlic, and seasonings. Reduce heat to simmer and cook about 1 hour per lb.