Loaded Potato Casserole

Ingredients (11)

• Unsalted butter, for greasing pan
• 3 pounds baking potatoes, peeled and quartered
• 1 teaspoon salt, or to taste
• 8 ounces light sour cream
• 1 (4.4-ounce) container Boursin Light Garlic and Herb Cheese
• 1/2 to 3/4 cup milk
• 6 to 8 medium green onions, thinly sliced
• 1 tablespoon finely chopped parsley
• 1/4 teaspoon freshly ground black pepper
• 10 slices cooked bacon, drained and crumbled
• 8 ounces shredded sharp cheddar cheese, divided