Bistec encebollado is a traditional Puerto Rican recipe featuring cube steak marinated in a flavor-packed combo of onions, sofrito and vinegar, before being stewed in a savory tomato based sauce. It's pure Puerto Rican comfort food.
Cut the cube steaks into strips and place them into a bowl or ziplock bag. Add 1 tbsp of olive oil, the vinegar, sazon, adobo and oregano. Toss to coat, and marinate for 1-2 hours in the refrigerator.
Heat a Dutch oven or caldero over medium heat. Add 1 tbsp of olive oil, the sofrito, and the marinated beef. Stir for 3-4 minutes to begin browning the meat.
Add the onions, tomato sauce, water and chicken bouillon. Stir to combine and bring the mixture to a boil.
Reduce the bistec encebollado to a simmer, cover with a lid and cook for 40-45 minutes, or until the beef is tender.
Serve with white rice and fried plantains.