It is important that the mushrooms and sun-dried tomatoes are well drained, otherwise they will add unnecessary moisture to the mix. That one step will help the patties to keep their shape well which is so important in a good veggie patty.
When I first starting making these patties, I wanted a mix that could be made in advance, and then keep well in the fridge so that they could be prepared on a Sunday for instance, but cooked on a Tuesday night.
I also wanted a patty that once cooked, would keep in the fridge for a good couple of days so that it could be used for lunches, or other meals.
These patties do all of the above so I feel sure they will become a favourite in your "veggie" style meals recipe file.