The Best Crispy Parmesan Potatoes

Name: The Best Crispy Parmesan Potatoes
Cuisine: American
Ingredients: 3 lbs mini creamer potatoes, (rinsed, dried + halved); 1/4 cup butter, (melted); 1/4 cup olive oil; 1/4 cup grated parmesan cheese; 2 tbs potato starch; 3 cloves garlic, (minced); 1 tbs Everything Bagel seasoning; 1/2 tsp chili pepper flakes; salt + pepper (to taste); 1/2 cup freshly grated parmesan; Garnish: freshly chopped parsley