I went to Atelier on a work trip... The food here was unapologetically molecular - super reduced sauces, nitrogen, liberal use of sous vide and so on.
A tasting menu is all that's available and cutesy names (not a fan, but whatever, the staff seem to enjoy them) tell you almost nothing about what you'll be eating. The dishes are described as they come to the table, however. Nothing was less than interesting/beautiful and a lot of it was really tasty.
Service was personable and they had a half-portion-wine pairing for about half the price if you don't like to drink a lot. On the night we went, we were the only guests, but apparently they can get quite busy.
A beef tartare was delicious with nitrogen frozen cream, sauces and a brushstroke of super-reduced beef broth. I really enjoy tartare and this was one of the best that I've had.
Highly recommended and good value for an admittedly mid-high price ($110 for the tasting menu). Since I'm not often in Ottawa, I'll be sure to return to see what new creations are produced.
540 Rochester Street
Ottawa ON K1S 4M1