Cut 2 pieces naan (or other flatbread) in half. Combine 2/3 cup shredded mozzarella, 1/2 teaspoon grated peeled ginger, 1 minced scallion and a pinch of salt; sandwich between the naan halves. Melt 1 tablespoon butter in a large nonstick skillet over medium heat. Stir in a large pinch of curry powder, then add the stuffed naan; cook until golden, 4 minutes per side. Cut in half.