Soak the lentils in cold water to wash away any debris
Remove the stems and seeds from the ancho pepper
Roast the ancho for 1-2 minutes
Grind ancho into a fine powder
Dice up 1/2 white onion and 1/2 jalapeno (use 1/4 jalapeno for less heat)
Saute onion and jalapeno in a dollop of oil until tender
Add diced garlic, ancho powder and cumin to the skillet and saute for a minute or so
Add the drained lentils and (warmed up) stock, stir well
Bring to a boil and then simmer for 20-30 minutes
Add an additional cup of stock/water if the lentils soak up all the liquid and are still a bit crunchy
Salt to taste
Garnish with cilantro