Depending on how you want your soup you can:
a) you can cut everything up and cook it all day.
b) my way

Add the following items to the crockpot:
Broccoli stems and some tops
half of the potato
onion
3 Green onion
chicken stock
butter
garlic

Cook for 6 hours

Add the rest of ingredients and milk. Cook till ready!

To mine I also added cayenne pepper and habanero peppers!

If you want some meat, add some chicken!