01 -
Sort and rinse split peas under cool water, removing any debris. Place in a large pot and cover with water 2 inches above peas. Bring to a boil for 2 minutes, then remove from heat. Cover and soak for 1 to 4 hours until peas soften. Drain and rinse peas, discarding soaking water.
02 -
Return soaked peas to the pot. Add 2 ½ quarts of fresh water, ham bone, chopped onion, salt, pepper, thyme, and bay leaf. Bring mixture to a boil.
03 -
Reduce heat to low, cover pot, and let simmer gently for 1 hour and 30 minutes. Stir occasionally to prevent sticking or burning.
04 -
Remove ham bone from pot and let cool. Shred meat from bone, discard bone, then return ham pieces back into the soup.
05 -
Add celery and carrots to the pot. Leave lid off and simmer for 45 to 60 minutes until vegetables are tender and soup reaches desired thickness. Remove and discard bay leaf before serving.