Step 1

Cut the onion in quarters.

Step 2

Cut the tomatoes in half.

Step 3

Cut the stems off the chiles, slice in half, and remove seeds.

Step 4

Peel the garlic.

Step 5

Add all of the ingredients except the cilantro and salt to a large pot.

Step 6

Add just enough water to almost cover the ingredients (about 4 cups).

Step 7

Bring the water to a boil and then reduce to low. Simmer for 20 minutes.

Step 8

Blend all of the ingredients including the cilantro with the cooking water (blend in 2 batches).

Step 9

Heat 2 tablespoons of cooking oil in the same pot over medium heat.

Step 10

Pour the blended salsa into the hot oil.

Step 11

Reduce the heat and simmer for 20 minutes.

Step 12

Adjust the salt to taste.