Can you use spray butter (no calorie ), or the Pam spray on your vegetables or on things you could cook?
PAM is a non-stick cooking spray that comes in different flavours (like olive oil or butter flavour).
You may use pam spray, just a bit.
There exists however also the opinion that Pam spray, based on canola oil, might be "the aspartame of cooking oils". It was proven that Canola oil has a few undesirable health effects when used as the main source of dietary fats.
That's why we recommend to use more natural sources like olive oil/coconut oil/walnnuts/etc. to get your allowed teaspoon of fats per day while on cabbage soup diet.