Pork "Saltimbocca" with Roasted Onions and Potatoes

INGREDIENTS

thick 1-inch-thick slices Pork loin

thin slices Prosciutto

Onions, cut into 1/2-inch-thick slices

1/4 cup

Sage, fresh leaves

Kosher salt and freshly ground black pepper

3 tbsp

Olive oil

1 1/2 cups

White wine, dry

1 pound small (2-inch-diameter) Yukon Gold potatoes, cut into 1/2-inch-thick rounds