Bistec Adobado with Grilled Green Onions

In a bowl, combine the ancho, guajillo and cascabel chiles and top with the vinegar and hot water. Place a weight on top of the chiles to keep them submerged and let stand until softened, about 15 minutes.

Meanwhile, in a sauté pan over medium-high heat, warm the oil until just smoking. Add the onion and garlic and cook, stirring occasionally, until golden brown, 3 to 5 minutes. Remove from the heat and set aside to cool to room temperature.

Once the chiles have softened, transfer them and their soaking liquid to a blender. Add the cooled onion and garlic and their oil and the cumin, salt, and pepper and blend on high speed until a thick paste forms.

Put the flank steak in a sealable plastic bag, add the chile paste, and seal the bag. Massage the contents of the bag to coat the meat evenly with the paste. Marinate in the refrigerator for at least 2 hours or up to 12 hours.

Preheat a grill pan over medium-high heat until very hot. Transfer the steak to the pan and grill, turning once, until well seared, 4 to 5 minutes per side for medium-rare. Transfer the steak to a cutting board and let rest for 5 minutes.

While the steak is resting, cook the green onions and limes. Grill the green onions in the grill pan over medium-high heat, turning occasionally, until browned and tender, 2 to 3 minutes. Place the lime halves, cut side down, on the grill and cook for 2 to 3 minutes.

Thinly slice the steak across the grain. Serve the steak with the tortillas, onion, cilantro, cabbage, cotija, salsa and grilled lime halves for squeezing. Serve the grilled onions on the side, or chop them coarsely to add to the tacos. Serves 4 to 6.

Tacolicious, San Francisco, CA.