• 3 large potatoes, peeled and cut into large chunks
• 1 cup cheddar cheese, grated
• 2 tablespoons fresh chives, finely chopped
• Salt and freshly ground black pepper
• 1 vine tomato, chopped and deseeded
• 1 onion, finely chopped
• 1 cup cheddar cheese, grated
• 2 tablespoons fresh chives, finely chopped, plus more
• Salt and freshly ground black pepper