Salt the beef:
Sprinkle the beef with salt and allow to rest for 1 hour.Sear the beef:
In a large cast iron pan or Dutch oven, heat the oil on high. Once hot, add the beef and cook, stirring, for 4 to 5 minutes.Cook aromatics:
Stir in the onion, jalapeño, oregano, and cumin. Cook, stirring occasionally, until the vegetables are tender, about 10 minutes.Simmer with tomatoes:
Lower the heat to low, add the tomatoes, and cook covered, stirring every 5 minutes to prevent sticking, until the meat is tender, roughly 45 minutes. Mix in the cilantro.Serve family-style:
Portion the meat and serve family-style with warm tortillas, rice, and pickled jalapeño on the side, if desired.