A wave of immigration during the communist years has seen a slow burn for Vietnamese food – from beef noodles to green rice ice-cream – in the Czech Republic’s capitalAn older Asian woman is hunched over a gas burner serving noodles, a young couple in the distance shuffle piously into a tiny Buddhist temple, and a perpetual gaggle of families emerge from a Vietnamese supermarket armed with giant sacks of rice. It is a scene as authentically Vietnamese as I could expect to find.