Cat's Café des Artistes. It's a Thai restaurant in north London (Finsbury Park) - absolutely FABULOUS and the prices are a steal. Literally, you can get out there spending less than £20/person with starters/mains/drink. My ex & I used to frequent this restaurant whenever we could get up there because of the value. The food is exceptional - my favorite is the starter of Thai sausages (you must try this!), and the atmosphere is comfortable and interesting (very thematically Thai). Great for dates, family, or just friends - or alone! They also do takeaway.
If you Google the name, you can find an address. I'm pretty sure the Tube stop is Finsbury Park, but don't quote me on that.