Make this with fridge left overs or prepare some extra vegetables just for this delicious recipe
Depending on your vegetables you could add an egg to bind this mixture. If you are using up leftover roasted vegetables that are a bit drier than fresh steamed ones it maybe hard to get them to stick together and bind with out a small egg.
Roll a small amount of you mixture as described and try frying a test patty before adding the egg to see if yours will hold together well.