Mix 1/3 lb. seasoned bulk pork sausage with 3 tbsp. seasoned dried bread crumbs. Mound sausage mixture in mushrooms, then set, filled side up, in a rimmed 10- by 15-in. baking pan.
Broil 6 to 7 in. from heat until sausage is well browned, about 5 minutes. Lift mushrooms onto a platter, brush with extra-virgin olive oil, and top each with a leaf of flat-leaf parsley.
Time: 20 minutes