Corn Chowder Pot Pie

Name: Corn Chowder Pot Pie
Ingredients: 3 slices thick-sliced bacon; 1 cup diced yellow onion (see note 1); 1 cup diced carrots; 1 cup diced baby gold potatoes (unpeeled); 2 teaspoons minced garlic; 2 tablespoons unsalted butter; 2 tablespoons flour; 1-3/4 cups whole milk; 1 teaspoon chicken bouillon powder; 1 teaspoon dried thyme; 1 cup frozen corn; 1/2 cup grated Parmesan cheese (see note 2); 1-1/2 cups chopped cooked chicken (like rotisserie); 1 cup shredded sharp Cheddar cheese (divided); 1 sheet puff pastry sheets; 1 large egg; Salt and pepper