If you don’t have a ham bone, add cooked, chopped bacon instead. If you’re a vegetarian, you can use vegetable broth instead of chicken broth and leave out the meat entirely.

Rinse peas. In a large pot, combine peas, broth, ham bone, marjoram, bay leaf, and a dash of pepper. Bring to a boil; reduce heat and cover. Simmer for an hour, stirring occasionally. Take out the ham bone, scraping any remaining meat back into the pot. Add carrot, celery, and onion to the pot and bring to a boil again. Reduce heat, cover, and simmer for 30 minutes.