In a large mixing bowl, add the sweet potato chunks, melted butter, olive oil, garlic cloves, grated parmesan cheese, garlic salt, and Italian seasoning. Stir together well until all the potatoes are coated.
3 cups sweet potato chunks, 2 tablespoons salted butter, 1 tablespoon olive oil, 2 cloves garlic, 1/4 cup grated parmesan cheese, ½ teaspoon garlic salt, ½ teaspoon Italian seasoning