Looks lovely. I am definitely looking for veggie burger recipes.
One thing worth mentioning is that baked beans in the US and in the UK/Europe are different. In the US, the baked beans you usually find are actually BBQ beans with a BBQ-like sauce rather than just plain tomato sauce. I learned that actually when I was living abroad in Israel where the baked beans were the UK/European kind.
I thought it might be worth mentioning because if you're in the US and making this with baked beans, the burgers will have a different flavor to them.