I cannot fathom listing Abkhazi Gardens as a restaurant - as it's a garden which just happens to have a house where the couple used to live and you experience the garden and it's worth stopping in the house to sample the experience of cream tea etc.
I think the Nature Conservancy runs the place and the food operation is run by volunteers so what they lack in polish they more than make up for which charm and friendliness. It's hard not to think about the love story behind these gardens while enjoying what was actually quite tasty light refreshments.
Do go - and enjoy the whole experience. It supports a very worthwhile cause and is enjoyable.