Makes 4

The last time I used white port was when I was marinating foie gras for a terrine a few years ago, but now that I've been re-introduced to the stuff it's definitely going to be my drink of the summer.

You don't need a formal recipe here; simply put a large measure of white port into a slim Jim or highball glass with ice and top it up with tonic water (Fever-tree is my favourite brand) and a slice of lemon.