I couldn't name a single 'favourite' but my local French restaurant, The French Table in Surbiton, is pretty dependable and they usually have a 'pork trilogy' dish on the menu - always pork belly done 3 different ways that vary from time to time. It often includes a pork and fois gras 'burger' that is beautifully, silkily lovely. There's a Malaysian on Charing Cross Rd in London that we always look forward to visiting, lovely fresh zingy food. And for some good old fashioned but high-end British, St John near Smithfield - their signature dish of roasted bone marrow on toast is heaven.
But sometimes it just depends on the circumstances at the time. One of my most fondly remembered meals was when we were in Cadgwith Bay in Cornwall; a lady ran a shop selling freshly caught & cooked crabs, and also made sandwiches from them. We took our sandwiches - regular shop-bought sliced white but packed with white & brown meat - down to the water's edge, and sat on the rocks, in the sun with a cool sea breeze, eating these delicious sandwiches containing rich, sweet crab from just out to sea from where we were. Normally I don't like eating outdoors but this was perfection.
Anyone else have a specific meal they always remember, even though it might be something very simple?