sous-vide prepared food seems cold I've recently been experimenting with sous-vide cooking. The results have been good, except that I find that the food can sometimes seem unpleasantly cold. Obviously I tried reducing the time between removing from the water and eating but this doesn't solve the issue completely.

For example, I cooked fish fillets at 50 degrees Celsius for 30 minutes. The flesh was beautifully medium-rare but after just a couple of minutes on the plate I found it far too cold for my taste.

Are there any techniques to heat up the food immediately before serving without over cooking it?
The core technique is prevent the food from getting cold.

With sous-vide and other low-temperature cooking methods, pre-warming your plates is essential. Also, sauces etc. should be pretty hot and you plate the coolest food (the meat or fish) last. Serve immediately.