1 lb button mushrooms
1/3 c olive oil
3 t red wine vinegar
1/4 c scallions
1 t garlic
1 t dijon mustard
1 t salt
1/4 t black pepper
3 t parsley
pack mushrooms into a sterile jar
stir together remaining ingredients-mix well
pour over mushrooms
screw on lid to seal
chill for several hours, inverting jar frequently
