"Impossible" Ham-and-Cheese Pie
SERVES 8
INGREDIENTS
1 tablespoon unsalted butter, softened, plus 2 tablespoons melted
3 tablespoons finely grated Parmesan cheese
8 ounces Gruyère cheese, shredded (2 cups)
4 ounces thickly sliced deli ham, chopped
4 scallions, minced
1/2 cup (2 1/2 ounces)...