Ham-Potato Phyllo Bake

Ingredients (13)

• 3 pounds red potatoes, peeled and thinly sliced
• 1 medium onion, chopped
• 8 tablespoons butter, divided
• 20 sheets phyllo dough (14x9 inches)
• 2 cups sour cream
• 2 cups cubed fully cooked ham
• 2 cups shredded cheddar cheese
• 7 teaspoons fresh dill weed, divided
• 2 teaspoons garlic powder
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 1 large egg, lightly beaten
• 2 tablespoons half-and-half cream