Chef John's Corned Beef and Cabbage

Combine corned beef and spice packet contents water onion carrots celery and salt together in a large pot or Dutch oven; bring to a simmer skimming off any foam that rises to the surface.

Cover the pot reduce heat to low and simmer until meat is almost fork-tender about 3 hours. Add potatoes and simmer uncovered until potatoes are almost tender about 30 minutes more.

Place cabbage pieces on top of and around meat cover the pot and simmer until cabbage is tender 20 to 30 minutes more.

Remove meat to a cutting board and let rest 10 to 15 minutes. Cut across the grain and serve in a bowl; ladle vegetables and broth over the top.