Tieghan Gerard on Instagram: "Crispy Parmesan Thyme Sweet Potato Stacks. Without a doubt, one of my most popular, most loved holiday sides. These are addictive with Crispy edges, garlic herb butter and soft, cheesy middles. Perfect in every way. 1 stick (1/2 cup) salted butter 1-2 cloves garlic, grated 6 medium sweet potatoes, cut into 1/8 inch thick slices 2 tablespoons chopped fresh thyme 2 teaspoons chopped fresh oregano 1/2 cup grated parmesan cheese 1/4 cup grated manchego cheese kosher…