Baked bean are free on green and EE.
Pasta and sauces are either free or have a small syn value if made up with water but the value depends on the flavour. As a general guide the tomato ones are free but the others are not.
If you do a search you will find specific values for the one you want to use as this questions comes up a lot.
Don't forget that on EE you need to include one third superfree so the P&S and beans on its own would not count as a EE meal.