Easy Homemade Parmesan Hamburger Buns

Name: Easy Homemade Parmesan Hamburger Buns
Ingredients: For the buns; 2 3/4 cups unbleached all-purpose flour; 1/2 cup finely grated Parmesan cheese; 1 teaspoon salt; 1 teaspoon onion powder; 1 tablespoon sugar; 2 1/2 teaspoons instant yeast; 4 tablespoons unsalted butter, softened; 1 large egg; 2/3 to 3/4 cups lukewarm water; Vegetable oil, for greasing; For the topping; 1 large egg white; 2 teaspoons sesame seeds