One of my must do's whenever I'm in Helsinki is to eat at Friends & Brgrs . It's probably the best vegan burger you can find there and a big plus is that they started with the vegan selection way before it became a trend thing for restaurants to go vegan! They also have "normal" burgers, so non-vegans: you'll be fine. :)
Their sauces are house made, they bake their own buns and all ingredients are fresh and local. So these burgers are a pretty healthy option. Which is good for people like me who eat burgers 4 times a week... :)
Me and my husband started our week in the best way by having a little lunch date here. <3 Have a great week!!