use open-cup mushrooms and a lot of them (about 500g, they’ll cook down to not much)
Cook them in two batches so that you can keep them in a thin layer in the pan
little bit of oil and a nice big pan
fry til the water comes out and sort of caramelises and sticks to the shrooms
set those aside and repeat with the second batch
when they’re nearly ready add some garlic and cook it it for a minute then put the first batch back in and throw in a glass of white wine, a spoon of balsamic vinegar and salt and pepper and cook for a couple of minutes until the wine has nearly bubbled away
Stir in some chopped fresh parsley just before you serve.
Serve on toast, obviously.
Or in a toasty (if you’ve got an old school breville)
butter the outside of the bread
coat the inside of the bread with dijon mustard
fill with chopped field mushrooms, garlic and fresh parsley