1. In a large pot, heat the oil over moderate heat. Add the onion, carrots, celery, bell pepper, and 1/2 teaspoon of the salt and cook, stirring occasionally, until the vegetables start to soften, about 10 minutes.
2. Add the water, broth, and the remaining teaspoon of salt to the pot. Bring to a boil. Reduce the heat and simmer until the vegetables are tender, about 10 minutes. Stir the beans and jalapeño into the soup and simmer for 5 minutes more.
3. Remove the pot from the heat and stir in the corned beef, vinegar, and parsley.
Make Ahead: If you make the soup ahead of time, wait to stir in the last three ingredients until you're ready to serve. Otherwise, the flavor of the corned beef will leach out into the broth, the vinegar will lose its bite, and the parsley will turn brown.
Wine Recommendation: This hearty soup calls for an equally hearty wine. Look for Australia's unique cabernet sauvignon/shiraz blend, a red wine redolent of blackberries, cassis, herbs, and eucalyptus. Its full body and frank fruitiness are just what you want.