I have a theory that you could open a restaurant serving ready meals from supermarkets (unknown to the mug punters) - and if you hyped it up enough - it would get rave reviews.
Think about it - find a really trendy up & coming area, plenty of bullshit, pretend you were always busy and only accept bookings 10 days in advance, hype up the descriptions of the meals - make a packet - all on snob value.
Dave