Part of the<br><div class="tagline"><img align="absmiddle" src="/blog/images/icons/globe.gif" /><a href="/blog/reference.php?id=343">Italian</div></a>
Chop up the onions and mushrooms.
Heat a frying pan with oil and fry the onions for a few minutes.
Add the mushrooms and fry for a few more minutes.
Add the mustard.
Add the creme fraiche.
Leave to cook for a few more minutes and serve hot with rice or whatever you fancy.