Step 2: Cook the chorizo.
In a 30cm cast iron skillet or heavy-bottomed saucepan, cook the chorizo over medium heat for about 5 minutes. Stir occasionally and crumble it until lightly browned.
Step 3: Sauté the onion and chilies.
Add the diced onion and green chilies to the pan containing the chorizo. Continue cooking for 5 to 7 minutes, until the onions are soft and translucent.
Step 4: Add the cheese
. Turn off the heat. Sprinkle the chorizo with Pepper Jack, Cheddar, and Oaxaca cheeses. Using a spoon, create small indentations so the cheese is evenly distributed without being completely incorporated.
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