Creamy Scalloped Potatoes

Name: Creamy Scalloped Potatoes
Ingredients: 3 tablespoons butter; 2 pounds (about 4 medium sized) Russet potatoes , peeled, sliced 1/8-inch thick; 1 large yellow or white onion , thinly sliced; 2 tablespoons fresh parsley, chopped; 1 tablespoon fresh chives , chopped (optional); 2 thick slices bacon , cooked and chopped; 2 1/2 cups grated Swiss or Gruyere cheese (about 8 ounces); 1/2 cup grated Parmesan cheese (about 2 ounces ); 2 1/2 cups to 3 cups half-and-half (half milk, half cream); Salt and pepper