Wash all vegetables and chop them into pieces.
If you are using the leftover Pork Cottage Roll broth, simply add all ingredients into the Instant pot broth except water and additional broth.
If you are starting from scratch add water and chicken broth into the Instant pot, then add all additional ingredients
Cover Instant Pot and set to - Manual - High Pressure and 15 minutes. Let it Cook.
Allow it to natural release when it is finished. About 15 more minutes. Open lid.
Remove bay leaf. If you used ham bone, remove that too.
If the split peas are still quite crunchy after cooking, add a tsp of Baking Soda. As mentioned above this can happen for a number of reasons.Re-cover Instant Pot set to - Manual - High Pressure and 5 minutes. This may take a while to get to pressure because of the large amount of liquid. Repeat until desired texture of peas is achieved. The soup will be pretty thick and chunky. You can use a potato masher to smash all the vegetables if you want a thinner version. You also can CAREFULLY put the very hot liquid in a blender or use an immersion blender to mix it up. WARNING AGAIN... the soup is VERY HOT and it is very easy to splash it everywhere. I generally use the potato masher if I am doing this. The soup is just as great when it is thick and chunky though.
Add salt and pepper to taste. Salt will probably not be needed as the pork broth usually gets quite salty.
Garnish with parsley if desired.