about £10 i suppose for three courses, mamacita's is nice so is the taj mahal, Joy for lunch or dinner ( a pizza is about £4) and White magic or Katy's
yeah, you'd do well to spend more than a tenner, even if you have a fancy steak with a big ol' starter and pudding.
try the titanic (opposite-ish rila) for a very very nice steak (the 'titanic', surprisingly enough). I had one last year, coupled with a starter and a few beers i couldn't even walk away from the place I was so gorged. and it was less than a tenner each for the evening.