At Qulma you will get a brunch, which keeps your hunger away until the evening. They have ready made plates (cheese or meat), yogurt with several different toppings (sweet pesto thing was good!), a vitamin shots plus the regular juice + coffees. If you want, you can upgrade your brunch with the glass of sparkling.
The place itself is nice in the heart of Kruununhaka, old district of Helsinki. If you want to be sure that you get seated, we recommend to make a table reservation, though we happened just pop in. Their speciality is the jacket potatoes. We were too filled after the normal breakfast part to even try the potatoes, but they seemed to be huge with couple of different filling. Generally food is good and basic. the most memorable articles were the yogurt with its toppings and a vitamin shot.
All this costs 18 euro (3,5 for a glass of sparkling), it's a bit pricy, but as already mentioned, you wont get hungry all day.