Cut the meat into medium-sized pieces, wash and leave it to strain. Heat the oil to a very high temperature in a pan and gently fry the meat to brown it on all sides. Add the onions and continue to fry everything together. Add the chopped tomatoes, salt, and pepper, cover the pan and reduce the heat. When the meat is partly cooked, add the peas and a little water and leave to cook further until the meat is tender and the sauce thick.