I was walking down St-Catherine street yesterday, when my eye caught two women with big plastic cups of something very delicious looking. And then I saw yeh!, a frozen yogurt café that just opened next door of 3 Amigos. Inside, it's a whole make-your-own self-service concept, with the friendly staff explaining to me that you choose your flavours (cheesecake, raspberry, blueberry, mango, lime, litchi, chocolate, banana, and two that are dairy-free: orange and bloody red orange), the quantity of, then add toppings (everything from gummy bears to raspberries to cookie dough) and pay everything by weight.
They also have crepes. The place extends into the back where big colourful pillows replace chairs on the floor which makes it a popular university hang-out spot.
I tried a swirl of chocolate and banana (very good), some cheesecake and raspberry topped with cookie dough. The only thing: it's cash only. Start emptying your piggy bank :)