How to Make It
In a large nonstick skillet, heat the olive oil. Add the anchovies and garlic, then add the kale in batches and cook over moderate heat, stirring, until the kale is wilted, 3 minutes. Add 1 cup of water, cover and cook until tender, 15 minutes. Top the kale with the cheese in an even layer. Cover and cook until the cheese melts, 2 minutes. Using a large slotted spoon, transfer the kale and cheese to the bottom half of the ciabatta. Top with radishes, olives and the top half of the ciabatta spread with mayonnaise. Close the sandwich and cut into 4 pieces.