Scrape the new potatoes and cook in salted water until just cooked.
Meanwhile wash and trim the spinach and cook in boiling salted water for a couple of minutes. Drain thoroughly and finely chop.
Drain the potatoes, dry in the steam and then roughly chop with a knife and season to taste. Add the spinach and a just a little cream. Keep warm in the oven for five minutes or more at say 325°F/170°C/Reg3.