Sausage-Stuffed Mushrooms

extra-large white mushrooms

olive oil, divided

Marsala wine or sherry

sweet or hot Italian sausage, removed from the casings (regular or gluten-free)

scallions, white and green parts, minced

garlic cloves minced

panko crumbs (regular or gluten-free)

mascarpone cheese, preferably Italian (can substitute with cream cheese)

freshly grated Parmesan

minced fresh parsley leaves

Salt and freshly ground black pepper