1/2 cup chopped white onion, divided
1/2 cup chopped cilantro, divided
1 serrano or jalapeño chile, finely chopped, including the seeds
1 tsp. kosher salt (or 1/2 tsp. fine salt)
2 firm-ripe avocados
For the tacos
1 lb. boiling potatoes (about 2 large)
1 lb. Mexican or Spanish chorizo
2 tsp. dried oregano, preferably Mexican, crumbled
12 to 15 6-inch corn tortillas, warmed
Queso fresco, for serving (optional)
Combine half of the onion and half of the cilantro on a cutting board (or in a molcajete, or mortar, if you have one) along with the chile and salt. Mince together with a large knife and mash with the side of the knife to create a paste (or mash with the pestle). Transfer to a bowl. Score the avocado, twist the halves apart, and scrape the flesh out of its skin with a large spoon into the bowl. Add the remaining onion and cilantro and stir together with a fork.
Peel the potatoes and cut them into 1⁄2-inch dice. Cook in a saucepan of boiling salted water until they are just cooked through and still hold their shape, about 5 minutes. Drain.
Remove the casings from the chorizo and crumble (Mexican) or finely chop (Spanish) the meat. Cook the chorizo in a large skillet (add a tsp. of oil if using Spanish chorizo) over medium heat, stirring, for 5 minutes. Add the potato and oregano and cook, stirring, for 5 minutes. Season with salt to taste.
Make tacos with the tortillas, guacamole, and queso fresco, if using.
Recipe shared from: http://www.finecooking.com/recipes/chorizo-potato-tacos.aspx?nterms=50030